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问题 单项选择题

抽油泵试压时，泵筒一端接试压接头，另一端接吸人阀组件，试压到达规定压力后，稳压5min压降不超过（）MPa为合格。

A.0.5

B.10

C.15

D.2

答案

参考答案：A

单项选择题

关于尿含铁血黄素试验，下列叙述哪项不正确

A．用普鲁士蓝反应显示含铁血黄素

B．亦称Rous试验

C．.阳性对慢性血管内溶血的诊断价值最大

D．阴性结果可排除血管内溶血存在

E．阵发性睡眠性血红蛋白尿常为阳性

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单项选择题

Network managers have long (140) practical voice-over-IP (VOIP) solutions. VOIP (141) ease network management and decreases costs by converging a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’s head-quarters with far-reaching branch offices can (142) tremendous amounts of (143) in long distance phone bills, provided that solution delivers POTS-like voice (144) over the Internet.

A．get

B．put

C．save

D．waste
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