2A11灰斗发出高料位报警,应停运()号高压柜。
参考答案:2号炉A列1、2
---When did you move to Beijing? ---Last year. But I _____ in a school in Japan for 8 years.
A.has taught
B.taught
C.has been taught
D.has been teaching
露天开采中,运输费用约占开采总成本费用的()%。