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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers
【单选题】颈外侧深淋巴结( )
A.
为沿颈外静脉排列的一纵行淋巴结链
B.
其上部的淋巴结位于咽腔鼻部的后方称咽后淋巴结
C.
其下部位于颈内静脉周围称锁骨上淋巴结
D.
其输出管汇成锁骨下干
E.
直接注入静脉角