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【判断题】
.电气设备相线碰壳接地,或惜电导线直按触地时,人体显没有按触带电设备外壳或带电导线但是跨步行走在电位分布曲线的范围内而造成的触电现象称跨步电压触电( )A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【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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