每一轿厢地坎上均须装设护脚板,其宽度应()于相应层站入口的整个净宽度。
A、小;
B、等;
C、大;
D、没有限制
参考答案:B
酸雨是指pH小于多少的降雨()
A.7.0
B.6.6
C.6.0
D.5.6
E.5.0
—Not getting that job was a big let-down.
—Don't worry. Something better will ________. [ ]
A. fall behind
B. take on
C. go by
D. come along