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【单选题】
在下列哪种情况下，禁止掘进机割煤（）A.
掘进机无照明灯
B.
无瓦检
C.
无指挥队长时
D.
无信号时
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【单选题】Five pilots landed J-15 fighter jets on the Liaoning， Cbina‘s first aircraft carrier the critics， who once described it as a shark without teeth.
A.
about
B.
above
C.
against
D.
across
【简答题】脚手架搭设时对接扣件开口应立杆___，横杆___;脚手架各杆件端头伸出扣件盖板边缘的长度不应小于___mm。脚手架扣件螺栓拧紧力矩应在___N•m与65N•m之间。
【单选题】利用某分子筛作催化剂，【图片】可脱除废气中的【图片】和【图片】，生成两种无毒物质，其反应历程如下图所示，下列说法正确的是【图片】
A.
X是
B.
汽车尾气中含有的氮氧化合物是由于汽油燃烧产生的
C.
中含有非极性共价键
D.
上述历程的总反应为：
【单选题】下列关于扣件安装的注意事项说法正确的有( )。
A.
扣件规格必须与钢管规格相同。
B.
连接纵向(或横向)水平杆与立杆的直角扣件，其开口要朝下。
C.
各杆件端头伸出扣件盖板边缘长度不应小于100mm。
D.
扣件螺栓拧紧力矩应小于30N·m。
【简答题】The moon is sma l ler than the earth. It is three hundred and eighty thousand kilometers away from us. In 1969, two Americans got to the moon by spaceship. They found no living things there. And there...
【单选题】According to the J-curve concept, which of the following is false--that the effects of a currency depreciation on the balance of payments are:
A.
Transmitted primarily via the income adjusted mechanism
B.
Likely to be adverse or negative in the short run
C.
In the long run positive, given favorable elasticity conditions
D.
Influenced by offsetting devaluations made by other countries
【单选题】The movie ________ on J. K.Rowling's Harry Porter and the Goblet of Fire was put on in the theaters on Nov.18,2005.
A.
basing
B.
based
C.
being based
D.
to be based
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