参加阅兵式的官兵排成一个方阵，最外层的人数是80人，问这个方阵共有官兵多少人( )
A．441
B．400
C．361
D．386
参考答案：A
_______ in the regulations(规定) that you should not tell other people the password of your e-mail
account.[ ]
A. What is required
B. What requires
C. It requires
D. It is required
椎-基底动脉系统TIA最常见的临床表现为（）
A.眩晕和呕吐
B.耳鸣和耳聋
C.跌倒发作
D.吞咽困难
E.复视
