5□3÷5，要使商的中间有0，□里最大填[ ]
A.4
B.5
C.6
答案：A
军团菌肺炎应首选
A．红霉素
B．青霉素
C．头孢他啶
D．庆大霉素
E．头孢唑啉
Hurry up ___ we ___ miss the train.
A．and, are about to
B．or, are about to
C．or, will
D．and, shall
