我国用于脊髓灰质炎预防的疫苗是A．灭活死疫苗 B．提纯疫苗 C_爱下问搜题

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问题单项选择题

我国用于脊髓灰质炎预防的疫苗是

A．灭活死疫苗

B．提纯疫苗

C．基因重组疫苗

D．减毒活疫苗

E．亚单位疫苗

答案

参考答案：D

解析：Albert Sabin把脊髓灰质炎病毒在猴子的肾脏细胞、Vero细胞及人二倍体成纤维细胞中一代又一代地培养，直到筛选出致病力较弱的毒株。得到的疫苗称为口服 (减毒)脊髓灰质炎疫苗(OPV)。

完形填空

完形填空。

       1   , I'm Meg. I'm twelve years    2   . I have a brother    3   a sister. My brother is nine and my sister
is    4   four. I like hamburgers and salad. My brother likes    5   and my sister likes ice cream. We    6
a small sports collection. We all like tennis.
     Today is my    7   birthday. It's January 21st. There's a big cake    8   the table. How    9    is it? Do
you know? It's seven   10   . Come to my mother's birthday party and have some cake.

( )1. A. Hello
( )2. A. young
( )3. A. but
( )4. A. no
( )5. A. tomatoes
( )6. A. has
( )7. A. mother
( )8. A. in
( )9. A. much
( )10. A. fens

B. Sorry
B. old
B. or
B. yes
B. tomatos
B. sound
B. mothers
B. on
B. many
B. jiaos

C. Please
C. big
C. and
C. last
C. one tomatoes
C. have
C. mother'
C. at
C. some
C. dollars

D. Thanks
D. small
D. with
D. only
D. some tomato
D. play
D. mother's
D. to
D. any
D. yuans

单项选择题

下列哪项超声心动图检查结果不支持肺心病的诊断（）

A.右室流出道内径≥30mm

B.右室前壁增厚

C.右心内径≥20mm

D.左右心室内径的比值＞2

E.右肺动脉内径及右房增大