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问题 选择题

中学生活与小学生活相比发生了很大的变化，积极适应新的生活，为此我们要[ ]

①遵守规章制度

②广泛结交新的朋友，趁开学之初，与同学们先玩一下

③调整好心态，寻求新的学习方法，积极主动地学习

④严格要求自己，勇敢地面对各种挑战

A．①②③

B．①③④

C．②③④

D．①②③④

答案

答案：B

单项选择题

Flow control is a function that prevents network congestion by ensuring that (59) do not overwhelm (60) with data.

There are three commonly used methods for handling network congestion. (61) is used by network devices to temporarily store bursts of excess data in memory until they can be processed (62) are used by receiving devices to help prevent their buffers from overflowing. (63) is a flow-control scheme in which the source device requires an acknowledgment from the destination aider a certain number of packets have been transmitted.

59（）

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices
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单项选择题

在脊柱骨折病人的搬运过程中，应固定的体位是（）

A.半卧位

B.侧卧位

C.俯卧位

D.仰卧过伸位

E.屈曲侧卧位
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