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【单选题】
换填垫层的厚度应根据置换软弱土分深度以及下卧土层的承载力确定,厚度不 宜小于( ),也不宜大于( )。
A.
0.5m 3m
B.
0.5m 2m
C.
1m 3m
D.
1m 2m
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【简答题】设A=(a ij ) 3×3 ,B=______. (A)AP 1 P 2 (B)P 1 AP 2 (C)AP 2 P 1 (D)P 2 AP 1
【简答题】分数时滞影响系统稳定性的原因在于________________是分数时滞的函数,分数时滞的变化将会使闭环系统特征根的位置发生变动,从而影响了系统的稳定性能。
【简答题】Unit2:Vocabulary 1. This move was unexpected, and proportionately _____. 2. These laws have abolished the ____ of the nobility . 3. I think I saw her, ____ , at a football match. 4. The warning light ...
【单选题】Have you ever argued ________ your parents? [     ]
A.
with
B.
to
C.
on
D.
of
【多选题】从哪些地方可以看到遗留痕迹?()
A.
回收站
B.
最近使用过的文件
C.
注册表
D.
文件最后更改的时间戳631
【单选题】---Where are your parents? ---They ______ to England.
A.
have gone       
B.
have been      
C.
had gone
【简答题】根据句意及首字母提示填空。 1.—Where's your rubber? —Oh, it's in my p______. 2.—Do your parents have sisters? —Yes. I have two a______. 3.—What s______ does he like? —He likes soccer, tennis and volleyball. 4.—Let'...
【单选题】— Where are your parents?   — They ____ Shanghai. They will be back in two days.
A.
have gone to
B.
have been to
C.
went to
D.
go to
【简答题】Unit2:Vocabulary 1. This move was unexpected, and proportionately _____. 2. These laws have abolished the ____ of the nobility . 3. I think I saw her, ____ , at a football match. 4. The warning light ...
【判断题】平键的工作面是两侧面。
A.
正确
B.
错误
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