EPEC的黏附由介导（）
A.菌毛
B.鞭毛
C.荚膜
D.黏附素
E.周毛
参考答案：D
He as well as his parents________ playing a game.[ ]
A. are
B. is
C. been
一个两位数除250，余数是37，这样的两位数是( )。
A．17
B．38
C．71
D．91
