A.The "sling effect" remains unproven and requires experimental corroboration.
B.The degree to which droplets collide is the only reliable method of assessing air flow.
C.The degree of turbulence may help forecast the formation of large-size droplets that precipitate rain.
D.Such factors as warm and cold fronts and individual cloud formations could not be performed otherwise.
E.The laws which govern the formation of concentration heterogeneities still need to be discerned.
第1题
修理过度磨损的钢质活塞环槽可采用_______方法使之恢复原始尺寸
A.光车
B.喷焊
C.光车+镀铬
D.镀铁
第2题
环槽端面过度磨损时,可在活塞上一道环槽采用_______修理
A.光车
B.修理尺寸法
C.恢复尺寸法
D.镶垫环
第4题
A.Ⅰ+Ⅱ+Ⅳ
B.Ⅰ+Ⅳ
C.Ⅰ+Ⅲ+Ⅳ
D.Ⅰ+Ⅲ
第5题
A.Ⅱ+Ⅲ+Ⅳ+Ⅴ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅲ+Ⅳ
D. Ⅰ+Ⅲ+Ⅳ
第8题
A.Ⅱ+Ⅲ+Ⅳ+Ⅴ
B.Ⅰ+Ⅱ+Ⅳ
C.Ⅲ+Ⅳ
D.Ⅰ+Ⅲ+Ⅳ
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