44.The purpose of this article is to_________ .
A.warn us of the wickedness of napping
B.explain the danger of sleepines
C.discuss the side effects of napping
D.convince the readers of the necessity of napping
45.The “American sleep debt”(Linel 2,Para.3)is the result of________
A.the traditional misconception the Americans have about sleep
B.the sleep policy of the Clinton Administration
C.the rapid development of American industry
D.the Americans' worry about the danger of sleepiness
46.The second sentence of the last paragraph tells us that it is_________
A.preferable to have a sound sleep before a night shift
B.good practice to eat something light before we go to bed
C.essential to make up for lost sleep
D.natural to take a nap whenever we fee the need for it
C
Meet the new Volvo 460.Volvo with so much going for it, you'll find it very easy to get into the driving seat. You will love the feel of this car,even before you've turned the key. Standard features on all models include adjustable steering column(可调整方向盘支撑杆),heated seats ,electric sunroof. On the GLE and Turbo models there are electric windows, heated door mirrors and power assisted steering.
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