常用裸导线类型及型号有()。
A、软铜圆线TR;
B、硬铜圆线TY;
C、软铝圆线LR;
D、H4~H9状态硬铝圆线LY4~LY9型。
参考答案:A, B, C, D
如图给出的三幅图,分别主要运用了什么光学知识?
答:A______;B______;C______.
---Do you think he will succeed?---Well , he’ll helped by many people, and, what's more, he works extremely hard.So he will ___ succeed.
A.perhaps
B.possibly
C.maybe
D.probably