题目内容

以下描述中正确的有()①响应时间是指从按动传送键到得到结果为止所需要的时间。② 处理时间是指计算机从接收一个消息到送出它的结果所经过的时间。③周转时间是指从提出要求到得到结果所需要的时间。④响应时间包括处理时间和传输时间。

A. ①②③④
B. ①③
C. ②③
D. ①②④

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系统测试是将已经集成好的软件系统与其他系统元素结合在一起,进行一系列的( )。

A. 单元测试和集成测试
B. 单元测试、集成测试和确认测试
C. 集成测试和确认测试
D. 验收测试

Archaeological studiessupport the claim that Kublai Khan, the founder of the Yuan Dynasty (1271-1368), invented mutton hotpot.

For a long time, only Beijing's privileged, such as the aristocracy, could get their hands on mutton hotpot. It was very popular among the royal families of the Qing Dynasty (1644-1911). From the imperial food archives, Emperor Qianlong (1711-99) was a true hotpot lover, indulging himself with the bubbling dish more than 200 times in 1789.

The public believes mutton has the therapeutic effect of warming the body, which makes it an ideal food for the colder months. Moreover, sheep are generally fattened up after a summer of voracious eating, making them ideal for meat lovers through the winter.