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运动员长期服用睾酮衍生物能提高肌肉力量,促进红细胞生成,从而,有利于提高运动成绩和增进身体健康。( )A.
正确
B.
错误
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【简答题】阅读理解 In China, more and more middle school students are getting shorter sleeping time than before. Most students sleep less than nine hours every night because they have much homework to do. Some home...
【简答题】某一电子有下列成套量子数(n、l、m、m s )，其中不可能存在的是( )。 (A) 3,2,2,1/2 (B) 3,1,-1,1/2 (C) 1,0,0,-1/2 (D) 2,-1,0,1/2
【简答题】Demographic indicators show that Americans in the postwar period were more eager than ever to establish families. They quickly brought clown the age at marriage for both men and women and brought the ...
【单选题】Society is now much more _____________ than ever before.
A.
diverse
B.
diffrent
C.
changing
【单选题】In the immediate future, exports will more than ever be the ___ of the Asian economies.
A.
lifeblood
B.
livelihood
C.
necessity
D.
mainstay
【单选题】This will make computer games more than ever.
A.
intermediate
B.
interact
C.
interactive
【单选题】听力原文： People in most countries depend on communications technology more than ever before. One day in May, an accident forced millions of Americans to be silent. They had to live and work without the t...
A.
Millions of Americans began to doubt the efficiency of telecommunications.
B.
Millions of Americans sued(起诉)the telecommunications company.
C.
Millions of Americans were frightened by the accident and became silent.
D.
Millions of Americans bad to live and work without the technology they depend on every day.
【简答题】With the help of Internet, ______ (communicate) has become more convenient than ever.
【单选题】属于主量子数n = 3 的一个电子的四个量子数n，l，m，ms 取值正确的是（ ）。(A)3,2,1,0 (B)3,2,-1,+1/2(C)3,3,1,+ 1/2 (D)3,1,2,+1/2
A.
( A ) 3,2,1,0
B.
( B ) 3,2,-1,+1/2
C.
(C) 3,3,1,+ 1/2
D.
( D ) 3,1,2,+1/2
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