Weather______ , the spaceship will be launched tomorrow evening
A. permits
B. is permitted
C. permitting
D. is permitting
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Most doctors recognized that medicine is _____.
A. an art as much it is a science
B. as much an art as it is a science
C. as an art as much it is a science
D. much an art as much it is a science
There is always the ____of an earthquake in this region, but so far there has been no sign
A. impossible
B. possible
C. possibility
D. impossibility
各类埋地输气管线至特殊建筑物，特殊的防护地带，炸药及爆炸危险品仓库、军事设施的最小安全防火距离为大于()m。
A. 100
B. 150
C. 200
D. 300
()是消防中广泛应用的天然灭火剂。
A. 泡沫
B. 水
C. 砂
D. 四氯化碳
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