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问题 单项选择题

采用平口虎钳装夹工件切断时，应使平口虎钳的固定钳口与铣床主轴轴心线平行，铣削力应（）。

A、背向固定钳口

B、平行于固定钳口

C、指向活动钳口

D、指向固定钳口

答案

参考答案：D

单项选择题

Man: How did you go to Canada, Jane Did you flyWoman: I was planning to, because it’s such a long trip by bus or by train. But Fred decided to drive and invited me to join him. It took us two days and a night.Question: What can we infer from the conversation

A．Fred is planning a trip to Canada.

B．Fred usually flies to Canada with Jane.

C．Fred persuaded Jane to change her mind.

D．Fred likes the beautiful scenery along the way to Canada.
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单项选择题

在因特网中，一般采用的网络管理模型是______。

A．浏览器/服务器

B．客户机/服务器

C．管理者/代理

D．服务器/防火墙
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