常用的燃气流量计包括容积式流量计、速度式流量计、()和差压式流量计。
参考答案:涡街流量计
--- I have great difficulty figuring out the answer to this problem.
--- _____ my advice, you ____ less difficulty with such problems.
A.If you had followed, would have had
B.If you followed, would have
C.If you had followed, would have
D.If you listen, will have
仿照下面画横线的句子,另写两个句子与前面形成排比,并与首句尾句相照应。(6分)
一首好诗,往 往 只 给 你 一 缕 春 风,就 能 叫 你 去 想 像 春 天 的 清 新;