“元神之府”指的是()
A.心
B.头
C.脑
D.胆
E.目
参考答案:C
某温度时,反应,△H<0,为提高CO的转化率,可采用下列()项方法。
A.增加总压力
B.升高温度
C.加入催化剂
D.降低温度
Because the shop ______, all the clothes are sold at half price.[ ]
A. has closed down
B. closed down
C. is closing down
D. had closed down