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【简答题】
关于内边距属性的赋值方式,下列说法正确的是( ) A. padding:10px;表示盒子四个方向padding均为10px B. padding:10px 20px 30px;表示上为10px，右20px，下30px，左0px C. padding:10px 20px;表示上下为10px，左右为20px D. padding:10px 20px 30px 40px;表示上右下左内边距分别为10px、20px、30px、40px
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举一反三
【单选题】When we got to the station, the train .
A.
will have left
B.
left
C.
has left
D.
had left
【单选题】When we got to the scene of the incident, we found that the police were firing shots and using teargas to______the crowd that had gathered around the building.
A.
dispose
B.
dislocate
C.
disintegrate
D.
disperse
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
5mm时损失较大
B.
8mm时损失较大
C.
一样大
D.
不确定
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
5mm 时热损失较大
B.
8mm 时热损失较大
C.
一样大
D.
不好说
【单选题】The sun when we got to the top of the mountain.
A.
had risen
B.
raised
C.
had raised
D.
rose
【单选题】有一外径为18mm的无缝钢管,管内通冷冻盐水,为减少冷量损失,在管外包一层导热系数 λ =0.18W/(m · °C )的石棉,保温层外壁与空气对流给热系数 α =10W/(m2 · °C ),比较石棉厚为5mm和8mm时的冷量损失()
A.
5mm时损失较大
B.
8mm时损失较大
C.
一样大
D.
不好说
【单选题】What a pity! When we got to the cinema，the movie The Assembly ，so we saw only the end of it．
A.
had just finished
B.
was finishing
C.
would finish
D.
just finished
【单选题】The plane ________ when we got to the airport. The plane ________ when we got to the airport. A . had taken off B . was taken off C . will take off D . is taking off
A.
had taken off
B.
was taken off
C.
will take off
D.
is taking off
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
8mm 时热损失较大
B.
5mm 时热损失较大
C.
一样大
D.
不好说
【单选题】The train when we got to the station.
A.
has just left
B.
had just left
C.
leaves
D.
left
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