通信中双方都可以发送和接收数据，但同一时刻只能有一方发送，这_爱下问搜题

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问题单项选择题

通信中双方都可以发送和接收数据，但同一时刻只能有一方发送，这种方式称为：（）

A.单工

B.半双工

C.全双工

D.以上都不对

答案

参考答案：B

填空题

给下列句子写上恰当的节日。

Christmas Day Thanksgiving Day Spring Festival
Mid-Autumn Festival Children's Day Lantern Festival

1. There are lots of lanterns and there's a dragon dance. It's                    .
2. We often get presents on that day. We have a Christmas tree. It's                          .
3. It's on June lst. The children love this festival. It's                           .
4. We have a big family dinner. We wear new clothes and eat jiaozi. It's                        .
5. We say "Thank you" for our food, family, and friends. It's                           .
6. We watch the moon and eat moon cakes on that day. It's                            .

判断题

任何单位和个人均可使用色票到列检作业场扣留定检到期、过期车。