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【多选题】
冒顶事故易发生的地点是（ ）。A.
放顶线
B.
煤壁线
C.
工作面上下出口
D.
有地质构造变化的区域
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举一反三
【单选题】What kind of customers need Cafepress. com most according to its vice-president.?
A.
Those who sell a great variety of items.
B.
Those who sell unconventional commodities.
C.
Those who want to avoid the trouble of negotiating with clients.
D.
Those who have problem keeping their commodities moving.
【单选题】I believe that when the power of love overcomes the love of power， will there be peace in this world.
A.
until then
B.
only which
C.
so
D.
only then
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