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爆炸范围通常用可燃气体、可燃蒸气在空气中的体积百分数表示。爆炸极限的()，爆炸危险性越大。
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【简答题】He put a cover on his car to keep it ______dirt. A free from B. far from C. apart from D. away from
【简答题】男，17岁，某农村中学学生，因突然畏寒、发热、周身酸痛、明显乏力，不能行走2天于8月12日抬送入院。体查：体温 39、5℃，脉搏110次/分，呼吸22次/分，结膜充血，心、肺(-)，右侧腹股沟可扪及一蚕豆大淋巴结，有压痛，无波动感。 1、为了协助诊断，应收集下列有关资料，除外： A.创伤史 B.蜱螨叮咬史 C.钩体病疫水接触史 D.当地类似疾病史 E.烟酒嗜好 2、实验室检查：WBC 9×109/...
【单选题】When you are going to put out a fire, you
A.
must be careful
B.
should keep air away from it
C.
must know it is dangerous
D.
should cover it with water
【单选题】SMR systems gain an edge over other services mostly by virtue of
A.
its prohibitive retail prices.
B.
its operational convenience.
C.
its wider coverage areas.
D.
its small storage capacity.
【单选题】According to the passage, heat from Mount Rainier's summit, craters rises from ______.
A.
crystalline ice
B.
rims
C.
chambers
D.
fumaroles
【单选题】I can your homework being wrong , but you mustn’t copy from others.
A.
put up with
B.
come up with
C.
keep up with
D.
end up with.
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