电梯提升高度是指从()到顶层端站地坎上表面之间的距离。
A、底坑底部
B、缓冲器顶部
C、轿厢地面
D、底层端站地坎上表面
参考答案:D
某市一天上午的气温是30℃,下午上升了1℃,半夜下降了7℃,半夜的气温是______℃.
A poet and journalist ________to give us a speech tomorrow in our school .
A.is said.
B.are said
C.is saying
D.are saying.