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【单选题】
以下有关装配图的说法正确的是________。A.
所有的零、部件都应编写序号；或将所有标准件的数量、标记按规定标注在图上，标准件不占编号，而将非标准件按序号编写。
B.
用细点画线来表示的运动零件极限位置的外轮廓
C.
所有的零、部件序号须一致
D.
倒角应该夸张画出
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【简答题】A．She hasn't learned French. B．She can speak several foreign languages including French. C．She can speak either German or French. D．She speaks neither French nor German.
【单选题】Why is the woman applying for the new job?
A.
She can meet a lot of Japanese.
B.
She can speak Japanese.
C.
She can go to Japan.
D.
The company can let her travel by train.
【简答题】有一块长35cm,宽25cm的长方形铁皮,在它的四个角上分别剪去一个名叫相等的正方形后, 正好 折成一个深5cm的无盖铁盒。这个铁盒的容积是( )cm 3 。
【单选题】Betty is from America, she can speak English she can’t speak Chinese. [ ]
A.
and
B.
so
C.
but
【单选题】对于桥式整流电路,已知输出电压平均值为UO=15v,负载电流平均值为IL=0.5A,在不考虑电网波动情况下,如下( )二极管参数符合要求?
A.
最大整流平均电流IF为0.2A，最高反向电压UR为60V
B.
最大整流平均电流IF为1A，最高反向电压UR为20V
C.
最大整流平均电流IF为0.3A，最高反向电压UR为20V
D.
最大整流平均电流IF为0.3A，最高反向电压UR为60V
【简答题】Sarah is from France. She lives in Paris. She can speak French and English, but she can’t speak Chinese. She has a pen pal in the United States. Her name is Jane and she lives in New York. Sarah’s fav...
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