总配线架底座水平误差每米不大于（）mm。
A.1
B.2
C.3
D.4
参考答案：B
--- Would you like to go to the party tonight?
---I’d like to, but I must go over my lessons, _________ tomorrow’s exam.
A．meaning passing
B．aiming to pass
C．intended to passing
D．pointing at passing
1854年法国化学家得维尔，在实验室中意外地发现一种新元素。已知该元素的一个原子中含有40个微粒，其中14个微粒不带电，则该元素是 [ ]
A.Ca
B.N
C.Al
D.Si
