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【单选题】
下列关于病毒的描述中，正确的是()。A.
计算机病毒也称为木马
B.
邮件病毒很厉害，只要收到带病毒的邮件，不管看不看，计算机都会染上病毒
C.
如果一台计算机染上了病毒，它旁边的计算机很有可能被传染，因此两台计算机之间要有一定的距离
D.
计算机病毒是一些人蓄意编制的一种寄生性的计算机程序
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【单选题】下列有关α螺旋的叙述哪个是错误的?
A.
分子内的氢键使α螺旋稳定
B.
减弱R基团间不利的相互作用使α螺旋稳定
C.
在某些蛋白质中,α螺旋是二级结构中的一种类型
D.
疏水作用使α螺旋稳定
【简答题】My parents went out last night and I stayed at home a________( 独自一人 ).
【单选题】下列有关α螺旋的叙述哪个是错误的
A.
分子内的氢键使α螺旋稳定
B.
减弱R基团间不利的相互作用使α螺旋稳定
C.
疏水作用使α螺旋稳定
D.
在某些蛋白质中，α螺旋是二级结构中的一种类型
E.
脯氨酸和甘氨酸残基使α螺旋中断
【单选题】听力原文：W: I can't understand why Linda didn't call me. M: She did. Didn't I tell you? She said she couldn't come for dinner, because she lost her train to come back. Q: What did the man say about Linda?...
A.
Linda wouldn't call the woman again.
B.
Linda didn't call.
C.
Linda would call next time.
D.
Linda couldn't come for dinner because she lost her train.
【单选题】A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework
A.
that
B.
if
C.
when
D.
which
【简答题】答复下级机关的请示事项使用 。
【单选题】I didn’t understand the ______question, so there was a ______expression on his face. [ ]
A.
puzzling, puzzled
B.
puzzling, puzzling
C.
puzzled, puzzled
D.
puzzled , puzzling
【简答题】Last Christmas was a very difficult time for me. My family and all of my close friends were back home in Florida, and I was all alone in a rather cold California. I was working too many hours and beca...
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