关于铜绿假单胞菌的致病机制，正确的是（） A.能产生外毒素 B.能产生内毒素 C.能

下列各项中，不属于流行性腮腺炎主要并发症的是（）.

A.脑膜脑炎

B.睾丸炎

C.卵巢炎

D.胰腺炎

E.喉炎

图11示意某地降水、风速的日变化。读图，完成21～22题。

小题1:根据降水的日变化判断，下列说法正确的是

A．该地最有可能是凹地形

B．该地最有可能是凸地形

C．该地最有可能为平原

D．该地夜雨多为锋面雨tesoon小题2:根据风速的日变化判断，下列说法正确的是

A．一天之中风速最大时太阳辐射最强

B．白天大气层比夜晚稳定

C．14时前后风速最大，因为此时空气对流最旺盛

D．风速的日变化主要是地形引起的

什么是化工单元操作？

阅读理解

     Matt and his wife lived in the country. Matt was very mean and hated spending money. One day

a fair(交易会)came to the nearby town.

     They went to the fair and looked at all the things to buy. Matt's wife wanted to buy a hat only costing $28, but was refused. Later on, a comb of $5 attracted her attention, but he would not let her spend

any money.

    Then, in a nearby field, they saw a small airplane. "Fun flight!" the notice said, "$10 for 10 minutes."

     Matt had never been in an airplane and he wanted to go on a fun flight. However, he didn't want to

pay for his wife either. "I've only got $10," he told the pilot. "Can my wife come with me for free?" The

pilot wasn't selling many tickets, so he said, "I'll make a bargain with you. If your wife doesn't scream,

she can have a free flight."

      Matt agreed, and got into the small airplane with his wife. The pilot took off and made his airplane do

all kinds of things. At one moment it was flying upside down.

      When the plane landed, the pilot said, "OK, your wife didn't make a sound. She can have her ride

free."

      "Thank you," Matt said, "it wasn't easy for her, you know, especially when she fell out."

1. How much did the couple spend at the fair?

A. $28.        

B. $5.    

C. $43.

D. $10.

2. The pilot flew the airplane upside down in order to _______.

A. throw the wife out of the plane     

B. get another $10 by making the wife shout

C. show off his perfect flying skills

D. provide the couple with pleasure of excitement

3. The passage is intended to _______.

A. teach readers a lesson  

B. attract tourists  

C. make readers laugh  

D. praise the couple

4. What can we infer from the passage?

A. Matt loved money more than his wife.  

B. Matt would like to buy everything for his wife.

C. The pilot didn't mind whether Matt's wife would pay.

D. Matt's wife enjoyed her riding in the plane.

通过观察UAP3300的SMCU板的哪个指示灯可以判断SMCU运行在主用状态还是备用状态（）。

A.ACT

B.ALM

C.RUN

D.无法从指示灯中判断主备状态