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【单选题】
小批生产,铸件上有局部不高的凸出部分,阻碍起模时常用的造型方法是( )。A.
整模造型
B.
活块造型
C.
挖砂造型
D.
刮板造型
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反馈参考答案：
举一反三
【单选题】执行下列二进制逻辑乘运算(即“按位逻辑与”运算)01011001&10100111，其运算结果是______。
A.
00000000
B.
11111111
C.
00000001
D.
11111110
【单选题】听力原文：I think I'd better leave now. It's getting late. (4)
A.
You're right..
B.
But it's still early.
C.
What do you think of it?
D.
Why are you so late?
【单选题】I ____ that we would be able to leave soon, but it’s beginning to look difficult.
A.
hoped
B.
have hoped
C.
was hoping
D.
had hoped
【单选题】－I my keys in the room yesterday. I had to get in the window. －It’s dangerous to do that.
A.
leave, from
B.
left, through
C.
forget, from
D.
forgot, through
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