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【单选题】
下列不能造成气液制动系气压上升缓慢的选项是A.
制动系管路密封不好，泄露
B.
气压调节组合阀漏气或储气筒排气阀关闭不严
C.
储气罐本身有砂眼、裂纹漏气或装在储气罐上的放水开关、安全阀漏气
D.
制动阀上下阀门关闭不严
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反馈参考答案：
举一反三
【单选题】肿瘤标志物检测的精密度要求是
A.
批内CV＜5%，批间CV＜10%
B.
批内CV＜10%，批间CV＜15%
C.
批内CV＜15%，批间CV＜20%
D.
批内CV＜5%，批间CV＜5%
E.
批内CV＜10%，批间CV＜10%
【单选题】What is the difference between a conference CV and a common CV used in other academic contexts?
A.
A conference CV is usually longer.
B.
The information in a conference CV is always listed in a reversed chronological order.
C.
The first person pronoun “I” and the second person pronoun “you” are often used in a conference CV.
D.
A conference CV is written in the form of a paragraph or a short passage.
【单选题】Cost Variance (CV) is which of the following equations?
A.
CV=BCWP-BCWS
B.
CV=BCWP-ACWP
C.
CV=SV/BCWS
D.
A and C
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