关于麻疹的流行病学正确的是（） A.患者是唯一的传染源 B.以消_爱下问搜题

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问题单项选择题 A1/A2型题

关于麻疹的流行病学正确的是（）

A.患者是唯一的传染源

B.以消化道传播为主

C.病后可获暂时性免疫力

D.发病以夏季为主

E.恢复期患者存在携带病毒现象

答案

参考答案：A

完形填空

完形填空。

     My name is Mary Smith. I am 12 years old. I have a   1 , Peter.    2 I don 't have a sister.3   love our
parents very much. Peter and 4 students in a school.
     I  5 computer games and I play 6 in the evening every day. I like sports, too. And I have some balls
for sports.   7    eight tennis balls and ten ping-pong balls.  I    8       ping-pong with my friends every
afternoon.  Peter doesn't like computer games or 9 .  He only likes reading( 读书).  He has many   10
aboutEnglish, math, Chinese... He reads books every evening. He is a very good student.

( )1. A. brother
( )2. A. And
( )3. A. She
( )4. A. is
( )5. A. like
( )6. A. it
( )7. A. take
( )8. A. bring
( )9. A. balls
( )10.A. books

  B. sister
  B. Or
  B. He
  B. am
  B. don't like
  B. them
  B. found
  B. need
  B. collection
  B. book

C. son
C. For
C. We
C. are
C. know
C. that
C. have
C. play
C. sports
C. games

D. daughter
D. But
D. They
D. be
D. play
D. this
D. has
D. plays
D. reading
D. balls

单项选择题

计算机安全的主要目标是保护计算机( )免受毁坏、替换、盗窃和丢失。

A．硬件

B．软件

C．资源

D．数据