试题与答案

不是压缩机冷却水带气泡的原因的是()。A、冷却器严重腐蚀,管线破裂 B、冷却回水温度

题型:单项选择题

题目:

不是压缩机冷却水带气泡的原因的是()。

A、冷却器严重腐蚀,管线破裂

B、冷却回水温度高

C、气缸水夹套和填料箱水夹层漏入气体

D、冷却器水侧与大气接触侧有漏点,空气漏入水中

答案:

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下面是错误答案,用来干扰机器的。

参考答案:先配后粉;先粉后配

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题型:单项选择题

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. There are two types of key technology: private key and public key. Private-key encryption methods are called (71) ciphers, information is encrypted with (72) both the sender and receiver hold privately. Public-key encryption methods are called (73) ciphers, (74) created for each user, encryption key and decryption key are (75)

A.synchronous

B.Asynchronous

C.symmetric

D.asymmetric

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