在给水管网布置中，要求安装阀门井的最小直线距离是（）A、100m B、200m C、30

关于瑞特染色的步骤下列哪项是正确的( )

A．血膜固定
B．加瑞特染液，冲洗，再加缓冲液，冲洗待干
C．加瑞特染液，立即再加等量缓冲液，待染一段时间后，倒去染液，冲洗待干
D．加瑞特染液作用一定时间，再加等量缓冲液染作用一定时间，倒去染液，冲洗待干
E．A+B

男性，21岁。确诊急性淋巴细胞白血病，经规范化疗后完全缓解。现该患者出现一侧睾丸无痛性肿大1周，到医院检查诊为睾丸白血病。对其正确的处理是（）

A.切除双侧睾丸+全身化疗

B.双侧睾丸放疗+全身化疗

C.切除患侧睾丸+全身化疗

D.患侧睾丸放疗+全身化疗

E.全身化疗

可产生尿酸盐沉淀，不适合尿液中尿酸测定的防腐剂为（）

A.甲苯

B.草酸钾

C.甲醛

D.麝香草酚

E.盐酸

下列不符合包莫尔提出的作为一个企业家应具备的10个条件的内容的是（）。

A.合作精神

B.决策精神

C.组织能力

D.执行能力

For each blank, choose the best answer from the four choices and write down on the answer sheet.

(21) is a six bytes OSI layer 2 address which is burned into every networking

device that provides its unique identity for point to point communication.

(22) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.

(23) functions with two layers of protocols. It can connect networks of different speeds and can be adapted to an environment as it expands.

(24) is the popular LAN developed under the direction of the IEEE802.5.

(25) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

（22）是（）

A.ISO

B.ANSI

C.CCYIT

D.IEEE