俯斜开采
参考答案:
是指倾斜长壁工作面自上而下推进采煤。
男性,16岁,近2天出现咽痛、发热。查体:咽充血.软腭、悬雍垂、咽及扁桃体表面有灰白色疱疹及浅表溃疡,周围有红晕,最可能的诊断是()
A.支气管炎
B.流行性感冒
C.肺结核
D.疱疹性咽峡炎
E.肺炎
Even to many scientists, the problems resulted from the conflict between economic gains and environmental protection are simply ______.
A. insoluble B. infallible C. inferable D. ineffable