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【单选题】
Which of the following may lead to family quarrels according to the passage（）
A．Unawareness of energy cycles.
B．Familiar monologues.
C．A change in a family member’s energy cycle.
D．Attempts to control the energy cycle of other family member.
A.
Do you find getting up in the morning so difficult that it is painful This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
B.
During the hours when you labour through your work you may say that you’re "hot" . That’s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues (自言自语) as: "Get up, John ! You’ll be late for work again !" The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
C.
You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late anyway. Counteract (对抗) your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam (鼓起干劲) and work better at your low point.
D.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble some search for clean clothes by laying them out the night before. When ever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.
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【单选题】When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source of the affliction and find ways to combat it. Oftentimes, success is achi...
A.
to comment and criticize.
B.
to demonstrate and argue.
C.
to interest and entertain.
D.
to explain and inform.
【单选题】14（） A．by means of B．in terms of C．with regard to D．in line with
A.
As one works with color in a practical, or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile, changeable thing (1) to a large extent on the relationship of the color (2) other colors (3) simultaneously. It is not (4) in its relation to the direct stimulus which (5) it. On the other hand, the properties of surfaces that give (6) to color do not seem to change greatly under a wide variety of illumination color, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to be (7) in large part to the mechanism of color (8) .
B.
When the eye is (9) to a colored area, there is an immediate readjustment of the (10) of the eye to color in and around the area (11) . This readjustment does not promptly affect the color seen but usually does affect the next area to which the (12) is shifted. The longer the time of viewing, the higher the (13) , and the larger the area, the greater the effect will be (14) its persistence in the (15) viewing situation. As indicated by the work of Wright and Schouten, it appears that, at (16) for a first approximation, full adaptation takes place over (17) time if the adapting source is moderately bright and the eye has been in (18) darkness just previously. Also, (19) of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become (20) over the whole eye.
【单选题】The UN’s resolution is calling for_____
A.
more severe punishment for crimes
B.
cracking down crimes
C.
abolishing capital punishment
D.
increasing fund for UN Human Rights Commission
【单选题】Tourists came to Alaska to （） A．study its importance in war B．study its volcanoes C．enjoy its freezing weather D．enjoy its beauty of nature
A.
Alaska, which was called Russian America before it was sold to the United States of America, joined the union as the forty-ninth state in 1959.
B.
Alaska is now the largest of all the 50 states of the United States.
C.
It was in 1867 that President A. Johnson’s Secretary of State (国务卿) ,Seward bought Alaska from the Russians at a cost of 7.2 million. The buying of the huge northern land mass seemed at first something foolishly done. Not only was Alaska difficult to reach, but it was also hard to live in, and it appeared to have no importance in time of war. Besides, there are volcanoes there as Alaska lies on the Pacific "ring of fire" (火山带). In Alaska large treeless areas are covered with snow all the year. For these reasons the buying of Alaska was called "Seward’s Fooly" at that time.
D.
However, in 1896 gold was found in Alaska, and people poured into the land quickly. Since then other important natural resources were discovered, including oil. Soon people changed their thinking about "Seward’s Fooly" . But most people visit Alaska in order to see the endless beauty of nature that the northern land discloses to them. For instance, there are about 11,000 islands in Alaska. And in a certain area of Alaska the sun does not set for 82 days every year.