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【单选题】
The text intends to tell us that（）
A. the change of human height follows a cyclic pattern
B. human height is becoming even more predictable
C. Americans have reached their genetic growth limit
D. the genetic pattern of Americans has altered
A.
In the early 1960s Wilt Chamberlain was one of the only three players in the National Basketball Association (NBA) listed at over seven feet. If he had played last season, however, he would have been one of 42. The bodies playing major professional sports have changed dramatically over the years, and managers have been more than willing to adjust team uniforms to fit the growing numbers of bigger, longer frames.
B.
The trend in sports, though, may be obscuring an unrecognized reality: Americans have generally stopped growing. Though typically about two inches taller now than 140 years ago, today’ s people—especially those born to families who have lived in the U. S. for many generations--apparently reached their limit in the early 1960s. And they aren’t likely to get any taller. "In the general population to- day, at this genetic, environmental level, we’ve pretty much gone as far as we can go," says anthropologist William Cameron Chumlea of Wright State University. In the case of NBA players, their in- crease in height appears to result from the increasingly common practice of recruiting players from all over the world.
C.
Growth, which rarely continues beyond the age of 20, demands calories and nutrients—notably, protein—to feed expanding tissues. At the start of the 20th century, under-nutrition and childhood infections got in the way. But as diet and health improved, children and adolescents have, on average, increased in height by about an inch and a half every 20 years, a pattern known as the secular trend in height. Yet according to the Centers for Disease Control and Prion, average height—5’9" for men, 5’4" for women—hasn’t really changed since 1960.
D.
Genetically speaking, there are advantages to avoiding substantial height. During childbirth, larger babies have more difficulty passing through the birth c. Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and can- not easily withstand repeated strain imposed by oversize limbs. "There are some real constraints that are set by the genetic architecture of the individual organism," says anthropologist William Leonard of Northwestern University.
E.
Genetic maximums can change, but don’t expect this to happen soon. Claire C. Gordon, senior anthropologist at the Army Research Center in Natick, Mass. , ensures that 90 percent of the uniforms and workstations fit recruits without alteration. She says that, unlike those for basketball, the length of military uniforms has not changed for some time. And if you need to predict human height in the near future to design a piece of equipment, Gordon says that by and large, "you could use today’s data and feel fairly confident.\
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【单选题】根据下面材料。回答70～72题： 投资者预测来年的市场收益率为12%，国库券收益率为4%。CFI公司股票的贝塔值为0.50，在外流通股的市价总值为1亿美元。 假定该股票被公正地定价，投资者估计其期望收益率为( )。
A.
4%
B.
5%
C.
7%
D.
8%
【单选题】当Form1_Click事件发生时，窗体上显示的第三行是( )。 Option Base 1 Private Sub Form_Click() Dim i As Integer，j As Integer Dim k As Integer，a(5，5)As Integer For i=1 To 5 k=1 For j=1 To 5 If i＜=j Then a(i，j)=k k=k+1 Else a...
A.
1 2 3 4 5
B.
1 1 2 3 4
C.
1 1 1 2 3
D.
1 1 1 1 2
【单选题】The author writes this passage to show that（） A. public school is becoming more and more inefficient B. public school is still preferred by the majority C. home schooling becomes an alternative to pub...
A.
More than 40 million Americans between the ages of 5 and 18 attend schools throughout the United States. About 2 million school-age children are taught at home. While home schooling offers an alternative to the school environment, it has become a controversial issue.
B.
Many public school advocates take a harsh attitude toward home schoolers, perceiving their actions as the ultimate slap in the face of public education and a damaging move for the children. Yet, as public school officials realize they stand little to gain by remaining hostile to the home-school population, the hard lines seem to be softening a bit. Some public schools have moved closer to tolerance, and，even in some cases, are seeking cooperation with home schoolers. " We are becoming relatively tolerant of home schoolers. Let’s give the kids access to public school so they’ll see it’s not as terrible as they’ve been told, and they’ll want to come back, " says John Marshall, an education official.
C.
Perhaps, but don’t count on it, say home-school advocates. Some home schoolers oppose that public school system because they have strong convictions that their approach to education—whether fueled by religious belief or the individual child’s interests and natural pace—is best. Other home schoolers contend " not so much that the schools teach heresy, but that schools teach whatever they teach inappropriately." "These parents are highly independent and strive to ’take responsibility’ for their own lives within a society that they define as bureaucratic and inefficient. " says Van Gallon.
D.
But Howard Carol, spokesman for America’s largest teachers union, argues that home schooling parents are trying to hide their children from the real world, says Van Gallon. " Maybe we are going to run into people with problems, people that have a drug problem, people that have an alcohol problem, and teenage pregnancy. We have many problems that happen in our society and many of the children are victims. But shielding the children from the real mix of what happens every day is denying them something that they are going to need later in life. " Mr. Carol also questioned the competence of parents as teachers though he admitted that some home schoolers do better academically. " We want to make sure that a student is not denied the full range of curriculum experiences and appropriate materials, especially now with the new technology that is being introduced and the costs involved there. "
E.
" The success of home schooling has been documented in standardized test scores administered by public school officials, " says Frank Bernet, the executive director of the National Association of College Admission Councilors. " I know why they are doing it, but I wonder why they can’t work with school officials and teachers to make the school what they want it to be. " The response from home schoolers: " We have tried that. NOW it’s time to strike out on our own. \
【单选题】各种会计资料包括打印出来的会计资料以及存储会计资料的软盘、硬盘、计算机设备、光盘、微缩胶片等，未经( )同意，不得外借和拿出单位。
A.
会计主管
B.
电算主管
C.
上级主管
D.
单位领导
【单选题】The fact that the heart is on the left side of the mother’s body provides the most convincing explanation of all.() A. Right B. Wrong C. Not mentioned
A.
An Observation and an Explanation
B.
It is worth looking at one or two aspects of the way a mother behaves towards her baby. The usual fondling, cuddling and cleaning require little comment, but the position in which she holds the baby against her body when resting is rather revealing. Careful studies have shown the fact that 80 percent of mothers hold their infants in their left arms, holding them against the left side of their bodies. If asked to explain the significance of this preference most people reply that it is obviously the result of the predominance of right-handedness in the population. By holding the babies in their left arms, the mothers keep their dominant arm free for manipulations. But a detailed analysis shows that this is not the case. True, there is a slight difference between right-handed and left-handed females; but not enough to provide adequate explanation. It emerges that 83 percent of right-handed mothers hold the baby on the left side, but so do 78 percent of left-handed mothers. In other words, only 22 percent of the left-handed mothers have their dominant hands free for actions. Clearly there must be some other, less obvious explanation.
C.
The only other clue comes from the fact that the heart is on the side of the mother’s body. Could it be that the sound of her heartbeat is the vital factor And in what way Thinking along these lines it was argued that perhaps during its existence inside the body of the mother the unborn baby get used to the sound of the heart beat. If this is so, then the re-discovery of this familiar sound after birth might have a claiming effect on the infant, especially as it has just been born into a strange and frighteningly new world. If this is so then the mother would, somehow, soon arrive at the discovery that her baby is more at peace if held on the left against her heart than on the right.