拔除上颌牙时,如牙根折断并进入上颌窦,首先要做的是A.安慰病人,让病人随诊观察 B.

题型:单项选择题

问题:

拔除上颌牙时,如牙根折断并进入上颌窦,首先要做的是

A.安慰病人,让病人随诊观察

B.立刻扩大拔牙窝掏根

C.采用上颌窦开窗术掏根

D.采用局部粘骨膜瓣关闭拔牙窝

E.立刻拍X线牙片

考点:口腔执业医师口腔执业医师36
题型:单项选择题

阅读理解,选择正确答案。

      When you are in England, you must be very careful in the street because the traffic drives on the left. Before

you cross the street, you must look at the right first and then the left. 

      In the morning and in the evening when people go to or come from work, the streets are very busy. Traffic

is the most dangerous then. 

      When you go by bus in England, you have to be careful, too. Always remember the traffic moves on the

left. So you must have a look first or you will go to the wrong way. 

      In many English cities, there are big buses with two floors. You can sit on the second floor. From there you

can see the city very well. It's very interesting.

1. In England the traffic drives _____________.[ ]

A. on the left

B. on the right

C. in the middle

D. in front of

2. When you cross the street in England, you must look at _____________.[ ]

A. the left first

B. the right first

C. the back of the cars

D. the lights of the cars

3. In the morning and in the evening the streets become very busy because the people _____________.[ ]

A. go to work

B. come from work

C. Both A and B

D. No answer

4. It's _____________ to sit on the second floor of the buses.[ ]

A. easy but dangerous

B. funny and interesting

C. dangerous but warm

D. cold and interesting

5. This passage is about _____________.[ ]

A. the people's life in England

B. the big buses with two floors

C. the traffic rules in England

D. the ways to learn English well

题型:单项选择题

幂函数y=f(x)的图象经过点(2,8),则满足f(x)=27的x的值是______.

题型:单项选择题

农谚说得好“有心栽花花不开,无心插柳柳成荫”这句话描述了柳树的生长繁殖的特点,其繁殖方式为  ①有性生殖②无性生殖③扦插④嫁接[ ]

A.①②

B.③④

C.②③

D.②④

题型:单项选择题

管理层次多,往往导致管理费用增多,这一特点属于( )。

A.跨度宽、层次多的组织结构

B.跨度宽、层次少的组织结构

C.跨度窄、层次多的组织结构

D.跨度窄、层次少的组织结构

题型:单项选择题

若f(x)存在二阶导数,求函数y=f(lnx)的二阶导数.

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