秘书不可以利用计算机网络发送（ ）。
A．秘密文书
B．绝密文书
C．一般性文书
D．机密文书
参考答案：B
—Where can I find Jim?
—He _______ the post office. [ ]
A. has been to
B. had been to
C. had gone to
D. has gone to
使用多根钢丝绳起吊货物时，绳间夹角不得大于（）度。
A.90
B.60
C.45
D.120
