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【单选题】
若a表示一个有理数，且有|-3-a|=3+|a|，则a应该是（ ）A.
任意一个有理数
B.
任意一个正数
C.
任意一个负数
D.
任意一个非负数
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】属于孕激素的生理作用的是
A.
使增生期的子宫内膜转化为分泌期
B.
使阴道上皮细胞增生、角化
C.
促使子宫肌层变厚，增强对缩宫素的敏感性
D.
使乳腺腺管增生
E.
促进输卵管的蠕动，利于受精卵的运输
【单选题】The main idea of the story is that ________.
A.
) the bond between fathers and sons is unbreakable
B.
) a son found that his father was his whole world
C.
) a father hoped that his son would have a better future
【简答题】The story of Paradise Lost is based on ____.
【单选题】The main idea of the story is that ________.
A.
) Dorothy, the mother in the house, quarreled with her daughter-in-law and decided to leave and start over
B.
) Dorothy and Tim, as mother and son, overcame a misunderstanding and made up to each other at last
C.
) thinking that she was redundant in the house, Dorothy decided to leave but her son and daughter-in-law convinced her that she was welcome and needed
D.
) Dorothy was worried about her place in the house when her daughter-in-law began to stay at home full time
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