机械压接钳是利用杠杆的原理，达到工作的目的。
参考答案：对
I can’t______what has happened to the vegetables,for they were freshly picked this morning.
A．draw out
B．look out
C．figure out
D．work out
什么是ISP（InternetServiceProvider的缩写，中文名为Internet服务提供商）
