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【多选题】
轴上零件的轴向定位和固定的方法主要有___________。A.
套筒
B.
圆螺母
C.
紧定螺钉
D.
弹性挡圈
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举一反三
【单选题】Hearing the noise, the old man looked forward to ___________________ what was happening there.
A.
seeing
B.
see
C.
saw
D.
seen
【单选题】病人，男，62岁，患慢性阻塞性肺疾病20年，近5年来出现双下肢水肿，5天前感冒后病情加重，口唇发绀，神志恍惚，双下肺闻及湿啰音，心率110次/分。该病人禁用哪种药物()
A.
呋塞米
B.
纳洛酮
C.
地西泮
D.
地高辛
E.
地塞米松
【单选题】Hearing the old man's report, the officer _______ from his seat and said something must be done to ________ people's living standards. [ ]
A.
raised; rise
B.
rose; raise
C.
raised; raise
D.
rose; rise
【简答题】An old man led her to there. She ______ an old man.
【单选题】The author recognized the old man as a bum probably because ______.
A.
the old man asked for money from him
B.
the old man was sleeping on the street comer
C.
the old man was poorly dressed
D.
the old man told him so
【单选题】一束自然光由空气(n=1)照射到一块有一定厚度的平板玻璃(n=1.5)上,根据布儒斯特定律可知,当光线以布儒斯特角入射时,反射光为线偏振光,此时的布儒斯特角为57度。 请问,折射进入平板玻璃的光线在其下表面(由玻璃到空气界面)反射时,反射光是哪种类型的光线?
A.
自然光
B.
部分偏振光
C.
光振动平行于入射面的线偏振光
D.
光振动垂直于入射面的线偏振光
【单选题】Hearing the old man's report, the officer _____ from his seat and said something must be done to improve people's living standards. [ ]
A.
raised
B.
rose
C.
raised up
D.
rose up
【单选题】Hearing the bad news, the old man couldn't help _______.
A.
to cry
B.
cry
C.
cried
D.
crying
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