【名词&注释】
年轻人(stripling)、抗原决定簇(antigenic determinant)、人流感疫苗、薄壁组织(parenchyma)、次生分生组织(secondary meristem)、侧生分生组织(lateral meristem)、人流感病毒(human influenza virus)
[单选题]次生分生组织可由( )直接转变而来。
A. 侧生分生组织(lateral meristem)
B. 初生分生组织
C. 原分生组织
D. 薄壁组织
查看答案&解析
举一反三：
[单选题]听第8段材料，回答第 10～12 题。第10题：How long has the man been in London?
A. One year.
B. A few years.
C. A couple of months
[单选题]菊科的雄蕊是( )。
A. 二体雄蕊
B. 单体雄蕊
C. 多体雄蕊
D. 聚药雄蕊
[单选题]
A. experiences
B. schedules
C. data
D. position
[单选题]It was a nice house, but _______ too small for a family of live.
A. rarely
B. fairly
C. rather
D. pretty
[单选题]44_______
A. if
B. until
C. unless
D. as
[单选题]为防止甲型H1N1病毒在人群中的传播，有人建议接种人流感疫苗，接种人流感疫苗能够预防甲型H1N1流感的条件之一是：甲型H1N1病毒和人流感病毒(human influenza virus)具有相同的
A. 侵染部位
B. 致病机理
C. 抗原决定簇
D. 传播途径
[单选题]C Too much TV-watching can harm children’s ability to learn and even reduce their chances of getting a college degree,new studies suggest in the latest effort to examine the effects of television on children.One of the studies looked at nearly 400northern California third-graders.Those with TVs in their bedrooms scored about eight points lower on math and language arts tests than children without bedroom TVs.
A. A second study ,looking at nearly 1000 grown-ups in New Zealand,found lower education levels among 26-year –olds who had watched lots of TV during childhood .But the results don’t prove that TV is the cause and don't ride out that alxeady poorly motivated youngstersC年轻人）may wash lots of TV.
B. Their study measured the TV habits of 26-year-olds between ages5 and 15. These with college degrees had watched拍average of tess than two hours ofTV per weekninght during childhood, compared with an averageofme than 2 1/2 hours fcf those wbe had no education beyond high school
C. In the California study, children with TVs in their rooms but no computer at home scored the lowest while those with no bedroom TV but who had home computers scored the highesl
D. While this study does not prove that bedroom TV sets caused the lower scores , it adds to accumulating fimiings that children shonldn't have TVs in their bedrooms
E. According to the Califomia study, the inw-scoring group might
F. have watched a lot of TV
G. not be interested ted in math
H. be unable to go to college
I. have had computers in their bedrooms
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