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搜题
【单选题】
吸气时膈肌收缩，胸内负压将A.
不变
B.
变小
C.
变大
D.
等于大气压
E.
高于大气压
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反馈参考答案：
举一反三
【简答题】In
this job you can formally learn more in addition to your existing skill. ____A.B.C.D. D
【简答题】In addition, they will learn to prepare more fully to participate in a world characterized by rather than by the “battle of the es”.
【单选题】两台主机之间的数据链路层采用退后N帧协议(GBN)传输数据,数据传输速率为16kbps,单向传播时延270ms,数据帧长度范围是128~512字节,接收方总是以与数据帧等长的帧进行确认。为使信道利用率达到最高,帧序号的比特数至少为( )
A.
5
B.
4
C.
3
D.
2
【单选题】3) In this job you can formally learn more in addition to your existing skill. ____
A.
1
B.
2
C.
3
D.
4
【单选题】Dish sink and surrounding areas should be cleaned and _______________ dry after use.
A.
wipes
B.
wiped
C.
wiping
D.
to wipe
【简答题】听录音，选出你听到的单词。 ( ) 1. A. bathroom ( ) 2. A. sink ( ) 3. A. dish ( ) 4. A. look ( ) 5. A. dry B. bedroom B. sing B. wash B. cook B. sky C. bathtub C. thing C. wish C. book C. cry
【单选题】As the ship is loaded, it will sink deeper and deeper into the water, but only sink deep enough to______an amount of water equal to the weight of the ship and its cargo.
A.
dismiss
B.
offset
C.
displace
D.
squeeze
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