计算题:有一铜管拉伸前的长度是50mm,拉断后的长度为55.8mm,试求其延伸率是多少?
参考答案:
单项选择。
We can in the library.[ ]
A. eat
B. read
---It’s ___to rain.
---Let’s get the work ___before the rain comes.
A.likely, done
B.possible, to be finished
C.probable, to be done
D.likely, to be finished