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问题 单项选择题

为排除体积管中的气体，使体积管的管壁和水的温度达到平衡，应使置换器在体积管内反复运行多次.然后，应至少进行（）次试检运行，让水以平稳的流量经过体积管进人标准量器.

A.两

B.三

C.四

D.一

答案

参考答案：D

单项选择题

女性，20岁，病史10天，发热，贫血，出血，肝、脾轻度肿大，颈部淋巴结肿大，伴关节痛，血红蛋白60g／L，白细胞35×109/L，血小板80×109/L，首先考虑（）

A.病毒感染

B.风湿热

C.急性白血病

D.淋巴病

E.SLE
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单项选择题

(71) In the strength of the carrier signal is varied to represent binary 1 or 0.
(72) is a system that can map a name to an address and conversely an address to an name.
(73) is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol
(74) is an approach that enables an ATM Switch to behave like a LAN switch.
(75) is an guided media which is made of glass or plastic and transmits signals in the form of light.

A．VLAN

B．LANE

C．VPN

D．IPOA
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