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【单选题】
优良的自交不亲和系要求
A.
蕾期自交亲和指数高
B.
花期自交亲和指数高
C.
蕾期自交亲和指数高,花期自交不亲和指数也高
D.
蕾期自交亲和指数高,花期自交亲和指数也高
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【单选题】Where do you think _____ ? [     ]
A.
he will go
B.
will he go
C.
he will go to
D.
will he go to.
【简答题】同义句转换。 1. Did you go to the cinema last night? Did you go to the _____ last night? 2. He likes seeing a film very much. He _____ seeing a film very much. 3. I would like to take a walk now. I _____ __...
【多选题】计算周转轮系对应的转化轮系的传动比公式 i AB H = ( ω A -ω H ) /(ω B - ω H ) 中, ____ 。
A.
ω A 、 ω B、 ω H 均为代数值
B.
ω A 、ω B、 ω H 自身的正负号代表转向
C.
构件A、B、H的几何回转轴线必须平行
D.
ω A 、ω B、 ω H 均为矢量
【判断题】外贸单证工作是外贸业务工作的基础。
A.
正确
B.
错误
【多选题】时间比例控制“TRC”的实现方式有:
A.
脉冲宽度调制
B.
脉冲频率调制
C.
混合调制
D.
脉冲幅度调制
【单选题】Seldom _________ to the countryside to see his parents. A) he does B) goes he C) does he go D) he does go
A.
he does
B.
goes he
C.
does he go
D.
he does go
【单选题】What will John do tomorrow?
A.
He will go picnic,
B.
He will go to school.
C.
He will go skating.
【单选题】---Your father’s never been to other countries, has he? --- ________. He plans to go abroad for a second time.
A.
No, he has
B.
Yes, he hasn’t
C.
Yes, he has
D.
No, he hasn’t
【单选题】He said he ______ to the cinema if he ______ time.
A.
will go; will have
B.
would go; would do
C.
would go; would have
D.
would go; had
【简答题】通过对串联机组及并联机组的效率计算,对我们设计机械传动系统有何重要启示?
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