Mary usually goes to school _______ her father's car.[ ]
A. by
B. in
C. with
D. on
答案:B
适用于DWDM系统使用的光纤有()。
A.G.652
B.G.653
C.G.654
D.G.655
“吐下之余,定无完气”的病机是()。
A.气能生津
B.津能载气
C.水停气阻
D.气能行津
E.气随津脱