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【单选题】
插管前润滑胃管前端的长度A.
10-15
B.
10-20
C.
30-40
D.
45-55
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反馈参考答案：
举一反三
【单选题】起搏器介导的心动过速是指
A.
起搏器对心脏自身的P波不能感知
B.
起搏器对心脏自身的QRS波群不能感知
C.
双腔起搏器感知房性期前收缩或其他信号后出现快速、规整的心室起搏
D.
出现长于基础起搏间期的固定起搏RR间距
E.
起搏器对不应该感知的信号进行感知
【简答题】变比n=10的变压器,原绕组接上E=10V的直流电源,副绕组两端电压为______________,原绕组接上E=10V的交流电源,副绕组两端电压为______________V,如果负载电阻RL=2Ω,那么原边的等效电阻为______________Ω。
【简答题】变比n=10的变压器,原绕组接上E=10V的直流电源,副绕组两端电压为______
【单选题】Which of the following statement is not correct?
A.
When pitch, stress and sound length are tied to the sentence rather than the word in isolation, they are collectively known as intonation.
B.
Chinese is an intonation language.
C.
Stress includes changes in pitch, volume, syllable length, and vowel clarity.
D.
The major four tones in English are falling tone, rising tone, fall-rise and rise-fall
【多选题】when ____,_____and ______are tied to the sentence rather than the word in isolation, they are collectively known as intonation.
A.
pitch
B.
stress
C.
sound length
D.
sound rythms
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