常见引起伪膜性肠炎的肠道菌有A．绿脓杆菌B．白色念珠菌C．肺炎杆菌D．难辨梭状芽胞杆

在同一Word文本中，能实现复制文字块的操作是( )。

A．选定字块，按下Ctrl键，然后用鼠标拖动该字块到新位置

B．选定字块，再将要复制的字块“复制"到剪贴板上，最后将字块“粘贴"到新的位置

C．选定字块，然后用鼠标拖动该字块到新位置

D．选定字块，再将要复制的字块“剪切”到剪贴板上，最后将字块“粘贴”到新的位置

     Mr and Mrs Brown had always spent their summer holidays in New Jersey(新泽西)in the past, staying in a small inn(旅店)at the foot of a hill.

     One year, however, Mr Brown made a lot of money in his business, so they decided to go to London

and stay at a really good hotel while they went touring around that famous city.

     They flew to London and arrived at their hotel late one evening. They had expected that they would

have to go to bed hungry, because in that small inn in New Jersey, no meals were served after seven. They were surprised when the waiter asked whether they would take dinner there that night. “Are you still

serving dinner?” asked Mr Brown. “Yes, certainly sir,” answered the waiter. “We serve it until half past

nine.”

   "What are the times of meals then?” asked Mr Brown. “Well, sir,” answered the waiter, “we serve breakfast from seven to half past eleven in the morning, lunch from twelve to three in the afternoon, tea from four to five, and dinner from six to half past nine.”

    "But that hardly leaves any time for us to see the sights of London.” said Mr Brown.  

1. Where had Mr and Mrs Brown always spent their summer holidays?

A. In New Jersey.

B. In Washington.

C. In New York.

D. In London.  

2. Where did Mr and Mrs Brown decide to go when they had a lot of money?

A. To New Jersey.

B. To a small city in England

C. To their hometown.

D. To the capital of England.   

3. How did they go to London? 

A. By bus

B. Be sea

C. By air

D. By train

4. In the passage the sentence “But that hardly leaves any time for us to see the sights of London” means _________

A. We can go to see the sights of London at any time.

B. We have little time to see the sights of London.

C. We have enough time to see the sights of London.

D. We can see more sights of London.   

5. From the passage we know that this was the ________ time for Mr and Mrs Brown to go to Londn.   

A. First

B. Second

C. Third

D. Fourth

下列有关化学用语，表达正确的是 [ ]

A．Na₂S的电子式：        

B．铯-137：¹³⁷Cs

C．O^2-的结构示意图：            

D．乙烯分子的球棍模型： 

磁选机的工作间隙一般为（）。

A、50-60mm

B、30-60mm

C、50-55mm

D、30-50mm

液压油箱由谁增压：（）.

A.气源系统

B.空调组件1和2

C.左发或气源系统