关于流行性感冒的流行病学特征，错误的一项是( )A．主要传染_爱下问搜题

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问题单项选择题

关于流行性感冒的流行病学特征，错误的一项是( )

A．主要传染源是流感病人及隐性感染病毒携带者
B．乙型流感病毒最易发生变异
C．呼吸道经空气飞沫传播
D．儿童及老年患者常易并发肺炎
E．动物亦可能为主要的贮存宿主和中间宿主

答案

参考答案：B

完形填空

完形填空。

     I am a student in Grade Three. I began to learn English the year before last. English isn't very   l   to learn. But I like it very much.
     2   do I study English?
     In the first year; I found   3   very difficult to memorize new words. At first I   4   a lot of time on them. I learned new words only   5   reading and writing them,   6  a few days later I forgot them. Later, I came to know how to do it well. I paid more
attention to   7   and spelling.
For example :

8 I have learned a lot of new words by heart. Every morning after I get up, I do some reading. At school I 9 to speak English with my classmates and go over 10 I have learned. Nothing is too hard if you put your heart into it.

( )1. A. hard
( )2. A. Why
( )3. A. this
( )4. A. took
( )5. A. with
( )6. A. and
( )7. A. pronunciation
( )8. A. By the way
( )9. A. join
( )10.A. that

B. excited
B. What
B. it
B. paid
B. for
B. but
B. words
B. In this way
B. lose
B. what

C. easy
C. Unless
C. that
C. spent
C. as
C. then
C. reading
C.. To begin with
C． try
C. which

D. fast
D. How
D. /
D. cost
D. by
D. however
D. writing
D. Later on
D. realize
D. when

单项选择题

下列各项中，不属于工程项目的反索赔内容的是( )。

A．工期延误反索赔
B．施工缺陷索赔
C．对指定分包人的付款索赔
D．发包方不合理放弃工程的索赔