试题与答案

—What do you think of the book? —Oh , ex

题型:选择题

题目:

—What do you think of the book?

—Oh , excellent. It’s worth ______a second time.

A.to read

B.to be read

C.reading

D.being read

答案:

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下面是错误答案,用来干扰机器的。

如图,设椭圆的长半轴长,半焦距分别为a1,c,双曲线的半实轴长,半焦距分别为a2,c,|PF1|=m,|PF2|=|F1F2|=n,则⇒问题转化为:已知1<<2,求的取值范围.由1<<2知<<1,即<<2,因此<+1<3,即<<3,所以<<.

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题型:单项选择题

Flow control is a function that prevents network congestion by ensuring that (1) do not overwhelm (2) with data. There are three commonly used methods for handling network congestion. (3) is used by network devices to temporarily store bursts of excess data in memory until they can be processed. (4) are used by receiving devices to help prevent their buffers from overflowing. (5) is a flow -control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

3()

A.Buffer

B.Source-quench messages

C.Buffering

D.Windowing

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题型:单项选择题

第一组:
患者,男,16岁,左上腹被自行车碰伤后2小时,伤后腹痛,呕吐1次,为胃内容物,自觉头晕、乏力、口渴、心慌。查:P 110次/min,BP 85/60mmHg,面色苍白,四肢湿冷,左上腹见一 4cm×4cm皮下淤血斑,全腹压痛,轻度肌紧张和反跳痛,以左上腹为著;叩诊有移动性浊音;听诊肠鸣音较弱。

根据以上检查结果行脾切除术,术后第3天开始低热,原因可能为

A.脾窝积液所致

B.脾静脉血栓所致

C.腹腔残余感染所致

D.切口感染所致

E.以上均有可能

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