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【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 ysis 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.
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举一反三

【单选题】12() A.aimed B.targeted C.focused D.pointed

A.
Digital photography is still new enough that most of us have yet to form an opinion about it (1) develop a point of view. But this hasn’t stopped many film and computer fans from agreeing (2) the early conventional wisdom about digital cameras — they’re neat (3) for your PC, but they’re not suitable for everyday picture taking.
B.
The fans are wrong. More than anything else, digital cameras are radically (4) what photography means and what it can be. The venerable medium of photography (5) we know, it is beginning to seem out of (6) with the way we live. In our computer and camcorder (7) , saving pictures as digital (8) and watching them on TV is no less practical — and in many ways more (9) than fumbling with rolls of film that must be sent off to be (10) .
C.
Paper is also terribly (11) . Pictures that are incorrectly framed, (12) , or lighted are nonetheless committed to film and ultimately processed into prints.
D.
The digital medium changes the (13) . Still images that are (14) digitally can immediately be shown on a computer (15) , a TV screen, or a small liquid crystal display (LCD) built right into the camera. And since the points of light that (16) an image are saved as a series of digital bits in electronic memory, (17) being permanently etched onto film, they can be erased, retouched, and transmitted (18) .
E.
What’s it like to (19) with one of these digital cameras It’s a little like a first date — exciting, confusing and fraught with (20) .

【多选题】下列有关药物经肾脏排泄的叙述中,正确的是

A.
药物经肾小管的分泌是主动转运过程
B.
药物经肾小管的分泌是被动转运过程
C.
肾小管对药物的再吸收属于简单扩散过程
D.
影响肾小管再吸收的主要因素为尿量和尿液pH
E.
酸性药物在酸性尿液中易于排出

【单选题】肝素的抗凝血作用机制是

A.
直接灭活凝血因子Ⅱa、Ⅶa、Ⅸa、Ⅹa
B.
增强抗凝血酶Ⅲ的活性
C.
抑制凝血因子的生物合成
D.
直接与凝血酶结合,抑制其活性
E.
拮抗维生素K

【多选题】有抗菌作用的药物是

A.
普鲁卡因
B.
青霉素
C.
链霉素
D.
红霉素
E.
环丙沙星

【多选题】阿昔洛韦主要用于治疗

A.
单纯疱疹病毒
B.
生殖器疱疹
C.
带状疱疹
D.
流感病毒
E.
乙型肝炎病毒

【单选题】临床上最常用的抗麻风病药是

A.
青霉素
B.
链霉素
C.
氨苯砜
D.
氨硫脲
E.
环丙沙星