结核性胸膜炎，首次抽取胸液一般不超过（）
A.1000ml
B.2000ml
C.700ml
D.800ml
E.500ml
参考答案：C
— __________ you say goodbye so soon?
— I’m sorry. My mother is expecting me at home. [ ]
A. Must
B. Can
C. Would
D. Might
重载货物列车速度在（）以下时，不应缓解列车制动。
A、30km/h
B、25km/h
C、20km/h
D、15km/h
