采煤机牵引部液压系统由若干个液压基本回路组成,包括()。
A.主回路系统
B.保护回路系统
C.控制回路系统
D.操作回路系统
参考答案:A, B, D
As the final exam is coming, my pressure ________, and I'm afraid it will ________ my failure.[ ]
A.builds up; lead to
B.comes up; cause to
C.turns up; bring about
D.makes up; stick to
中度发热的口腔温度是()
A.37~37.2℃
B.37.3~37.9℃
C.38~38.9℃
D.39~40.9℃
E.41℃以上