工作面采煤机检修时,必须检查作业环境。作业地点必须满足的条件包括()
A.不空顶作业
B.煤壁无片帮
C.架间无漏矸
D.运输机闭锁
参考答案:A, B, C, D
(2013·长沙二模)—The research on the new flu virus vaccine is challenging and demanding.Who do you think can do the job?
—________ my students have a try?
A.May
B.Must
C.Will
D.Shall
下列关于脑膜瘤的描述,错误的是()
A.女性多见
B.与硬脑膜粘连紧
C.多有包膜
D.均为实性肿块
E.多呈较高密度