【名词&注释】
氨基酸(amino acid)、核苷酸(nucleotide)、生活方式(life style)、广东万年青、百合科(liliaceae)、君子兰(junzilan)、天南星科植物(infecting araceae plants)、色彩鲜艳(in gay colour)、脱氧核糖(deoxyribose)、同功器官(analogous organ)
[单选题]天南星科植物(infecting araceae plants)的佛焰苞均色彩鲜艳(in gay colour)。( )
A. 正确
B. 错误
查看答案&解析
举一反三：
[单选题]地衣的有性生殖由共生的真菌和藻类共同完成。( )
A. 正确
B. 错误
[单选题]Many lifestyle. patterns do such great harm to health that they actually speed up weakening of the human body.
A. a; /
B. /; the
C. a; the
D. /; /
[单选题]（1）1分题（共8题）1.下列有机化合物中，只含有C、H、O三种元素的是
A. 氨基酸
核苷酸
脱氧核糖(deoxyribose)
磷脂
[单选题]属百合科。
A. 广东万年青
B. 万年青
C. 君子兰
D. 朱顶红
[单选题]叶刺、茎刺和皮刺是同功器官(analogous organ)。( )
A. 正确
B. 错误
[单选题]根据下面，回答45 ~48 题：BHaving a husband means an extra seven hours of housework each week for women, according to a new study. For men, getting married saves an hour of housework a week. “It’s a well-known pattern,” said lead researcher Frank Stafford at University of Michigan’s Institute for Social Research. “Men usually work more outside the home, while women take on more of the housework.”
B. Overall, times are changing in the American home. In 1976, women busied themselves with 26 weekly hours of sweeping-and-dusting work, compared with 17 hours in 2005. Men are taking on more housework, more than doubling their housework hours from six in 1976 to 13 in 2005.
C. Single women in their 20s and 30s did the least housework, about 12 weekly hours, while married women in their 60s and 70s did the most-about 21 hours a week.
D. Men showed a somewhat different pattern, with older men picking up the broom more often than younger men. Single men worked the hardest around the house, more than that of all other age groups of married men.
E. Having children increases housework even further. With more than three children, for example, wives took on more of the extra work, clocking about 28 hours a week compared with husbands’10 hours.
F. 第5题：According to the “well-known pattern” in Paragraph 1, a married man___________.
G. takes on heavier work
H. does more housework
I. is the main breadwinner
J. is the master of the house
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