角在()以上使用有链牵引采煤机,必须配有液压安全绞车。

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问题:

角在()以上使用有链牵引采煤机,必须配有液压安全绞车。

考点:矿井机电维修工矿井机电维修工题库
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已知全集U={2,3,a2-2a-3},A={2,|a-7|},CUA={5},则实数a的值是 ______.

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用98%浓硫酸配制200mL 0.5 mol•L1的硫酸溶液,一定需要使用的玻璃仪器是

①玻璃棒  ②烧杯  ③胶头滴管  ④量筒  ⑤200mL容量瓶

A.①②③

B.①②④

C.③④⑤

D.全部

题型:填空题

旅游纠纷调解原则包括( )。

A.诚实信用原则

B.合法原则

C.自愿原则

D.公正原则

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下列各项中,指标值越高,说明企业获利能力越强的是()。

A.资产负债率

B.成本费用利润率

C.存货周转率

D.流动比率

题型:填空题

Sometimes we have specific problems with our mother; sometimes, life with her can just be hard work. If there are difficulties in your (1) , it’s best to deal with them, (2) remember that any (3) should be done (4) person or by letter. The telephone is not a good (5) because it is too easy (6) either side to (7) the conversation.

Explain to her (8) you find difficult in your relationship and then (9) some new arrangements that you think would establish a (10) balance between you. Sometimes we hold (11) from establishing such boundaries because we are afraid that doing (12) implies we are (13) her. We need to remember that being (14) from our mother does not (15) mean that we no longer love her. If the conflict is (16) and you cannot find a way to (17) it, you might decide to give up your relationship with your mother for a while. Some of my patients had (18) "trial separations". The (19) allowed things to simmer down, enabling (20) .

(15)()

A.instantly

B.reluctantly

C.necessarily

D.steadily

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