0.345×823+0.345×169=( ) A．345 B．345.345 C_爱下问搜题

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问题单项选择题

0.345×823+0.345×169=( )

A．345

B．345.345

C．34.845

D．3.645

答案

参考答案：B

选择题

— Have you seen Bob recently?
— No, but I was told that he _____ for a new job all through the summer.

A. has been looking
B. had been looking
C. is looking
D. was looking

单项选择题

面向连接的协议是指在这种协议下，通讯开始前需要（）。

A.发送主机把目标主机的地址安装正确即可开始通讯

B.发送主机先与路由器建立起连接，然后即可开始通讯

C.发送主机需要确认接收主机同意进行通讯

D.发送主机先与ISP连接成功后，才能开始通讯