乘吊篮上下平台时，人员可以站在吊蓝中间。
参考答案：错
解析：乘吊篮上下平台时，人员不可以站在吊篮中间。
The computer, ______________ help we human beings have stepped into the information age, should be made full use of to promote the social development.
A．which
B．whose
C．with its
D．with whose
ISDN是在______的基础上建立起来的网络。
A．PSTN B．X.25 C．DDN D．ATM
