正确答案: B
错误
题目:天南星科植物的佛焰苞均色彩鲜艳。( )
解析:解析:本句可改为“天南星科植物的佛焰苞,有些色彩鲜艳,有些无鲜艳色彩”。
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举一反三的答案和解析:
[单选题]地衣的有性生殖由共生的真菌和藻类共同完成。( )
错误
[单选题]Many lifestyle. patterns do such great harm to health that they actually speed up weakening of the human body.
/; the
解析:解析:本题考查冠词。句意:许多生活方式对人类的健康有害,他们加速了人类身体的衰退。本题考查冠词,对……有害用短语“do harm to”表示,中间无需冠词;之后的weakening是由动词的ing形式表示抽象的名词,表达一种概念、状况时需要加上the。
[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
氨基酸
核苷酸
脱氧核糖
磷脂
解析:氨基酸由主要由C、H、O和N四种元素组成,核苷酸由C、H、O、N和P组成,脱氧核糖是一种戊碳糖只由C、H和O组成,磷脂由C、H、O、N和P组成。
[单选题]属百合科。
万年青
[单选题]叶刺、茎刺和皮刺是同功器官。( )
正确
[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.”
is the main breadwinner