吸入性肺脓肿绝大多数都有的病原菌是（）. A.金黄色葡萄球菌 B_爱下问搜题

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问题单项选择题 A1/A2型题

吸入性肺脓肿绝大多数都有的病原菌是（）.

A.金黄色葡萄球菌

B.厌氧菌

C.肺炎克雷伯杆菌

D.大肠埃希菌

E.肺炎链球菌

答案

参考答案：B

完形填空

       Vitamins(维生素)  are a discovery of the 20th century. A hundred years  1   , no one knew
anything   2   them. The vitamins are   3   by letters of alphabet. Vitamin A   4   by the eyes. There
is vitamin A in milk, butter and green vegetables It 5   by the body.
       Vitanun B must be supplied (提供)  6   by some of our food. The skins  7   grains of all sorts
have vitamin B in them.
       Vitamin C is very important   8_ the body. Without it   9   teeth will become loose and their
arms and legs become weak. Oranges and tomatoes 10   vitamin C in them.
       There are other vitamins.  But these A, B,C are the most important.

( )1. A. before
( )2. A. about
( )3. A. naming
( )4. A. needs
( )5. A. stores
( )6. A. times
( )7. A. of
( )8. A. in
( )9. A. people
( )10.A. has

B. front
B. of
B. named
B. need
B. be stored
B. in not time
B. to
B. at
B. peoples'
B. have

C. ago
C. in
C. is named
C. is needed
C. can store
C. all the time
C. on
C. with
C. people's
C. there is

D. ahead
D. for
D. names
D. was needed
D. can be stored
D. any times
D. in
D. to
D. peoples
D. there are

填空题

|x+1|+|x|=2无根
(1)x∈(-∞，-1)。 (2)x∈(-1，0)。