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【单选题】
类似螺纹一样,蜗杆有_____之分,_____之分。A.
粗牙、细牙/左旋、右旋
B.
、多头/粗牙、细牙
C.
梯形、三角形/左旋、右旋
D.
、多头/左旋、右旋
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皮皮学刷刷变学霸
举一反三
【单选题】Luckily enough, the bird avoided ________.
A.
killing
B.
to kill
C.
to be killed
D.
being killed
【单选题】The word bird once referred to 'young bird', but now it is used to mean 'any kind of bird'. This is an example of______.
A.
widening of meaning
B.
narrowing of meaning
C.
meaning shift
D.
loss of meaning
【单选题】The word bird used to mean 'young bird' today it means 'any kind of bird'. This is called ______ in terms of semantic change.
A.
broadening
B.
narrowing
C.
meaning shift
D.
class shift
【单选题】投标人撤回已提交的投标文件,应当在投标截止时间前书面通知招标人。招标人已收取投标保证金的,应当自收到投标人书面撤回通知之日起( )日内退还。
A.
5
B.
10
C.
15
D.
20
【简答题】《Mi—Mi弥撒曲》
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