【单选题】What do some scientists say about taking medicines for the common cold according to the passage?
A.
It is good for people.
B.
It actually does more harm than good.
C.
It can help people keep healthy.
D.
It can give them more energy.
【判断题】如果用钢丝绳夹制作绑扎钢丝的接头,绳夹的鞍形部分应装在活动载荷段,"U”形螺栓应装在静载或缩短端段
【判断题】甾族化合物的基本结构为环戊烷并多氢菲,四个环分别用A、B、C、D表示,C11和C13上常有甲基(称为角甲基),C17上有一个不同碳数的碳链。
【单选题】------How do you like the film we saw yesterday ? ------________, I am pleased with it though some parts are boring.
【判断题】如果用钢丝绳夹制作绑扎钢丝的接头,数量不得少于三个,其间距不小于15Omm