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问题 单项选择题

灰浆泵加盘根时，盘根各接口位置错开（）松紧适当，并有再紧余量。

A.30°～45°；

B.45°～75°；

C.90°～180°；

D.10°～20°。

答案

参考答案：C

阅读理解与欣赏

阅读下面这首诗歌，然后回答问题。

马 嵬

[清]袁 枚

莫唱当年长恨歌，人间亦自有银河。

石壕村里夫妻别， 泪比长生殿上多。

①作者在《随园诗话》中说此诗是“借古人往事，抒自己之怀抱”。这首诗“借古人往事”表达了诗人什么样的思想感情？请作简要分析。

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②这首诗最主要的表达技巧是什么？请作简要分析。

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单项选择题

In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) ,it must describe the traffic to be offered and the service expected.

1（）

A．interval

B．time

C．slot

D．delay
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