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【单选题】
板式楼梯底面抹灰面积按水平投影面积乘以系数（ ）计算。A.
1.15
B.
1.37
C.
1.35
D.
1.25
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反馈参考答案：
举一反三
【简答题】热敏电阻有负温度系数()和正温度系数(PTC)之分
【简答题】What does the passage say about asteroids and meteoroids? A) They are heavenly bodies different in composition. B) They are heavenly bodies similar in nature. C) There are more asteroids than meteoroi...
【单选题】Read the following passage and choose the best answer to fill in the blank.Unless we spend money to spot and prevent asteroids now, one might crash into Earth and destroy life as we know it, say some ...
A.
while pushing asteroids off course nuclear weapons would destroy the world
B.
asteroids racing across the night sky are likely to hit Earth in the near future
C.
The worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D.
Workable solutions still have to be found to prevent a collision of asteroids with Earth
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