题目内容

空场采矿法中的（）的特点是：212作面沿矿体走向或倾向全面推进，在回采过程中将矿体中的夹石或贫矿留下，呈不规则的矿柱以维护采空区，这些矿柱一般作永久损失，不进行回采。

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更多问题

平屋顶和斜屋顶的坡度区分界限值是()。

A. 0.02
B. 0.06
C. 0.1
D. 0.12

如果某一地区既无铂矿也无铀矿，则下列哪一地区不可能有铂矿？()

A. F。
B. G。
C. H。
D. I。

Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
(12)

A. In an office.
B. In a hotel.
C. At a dinner table.
D. At the man's house.

公民对海关处1万元以上罚款的处罚有要求听证的权利。

A. 正确
B. 错误