正确答案: D

气候变干

题目：艾丁湖1万多年来变迁的主要原因是

解析：D

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学习资料的答案和解析：

[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

[单选题]Playing on a frozen sports field sounds like a hot of fun. Isn’t it rather risky,____?

thought

[单选题]“视人之国，若视其国；视人之家，若视其家；视人之身，若视其身。”这一主张属于

墨家“兼爱”思想

[单选题]韭菜叶切断后，能继续生长，是因为下列何种生长的结果?( )

居间生长

[单选题]下列哪个结构不是双子叶植物茎初生结构的维管柱所具有的( )。

中柱鞘

[单选题]蕨类植物的叶有单叶也有复叶。( )

正确