正确答案: B
环境
题目:“孟母三迁”的故事说明了哪种因素对人发展的影响?
解析:B
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学习资料的答案和解析:
[单选题]Mathew Brady______.
was famous for his unusual pictures
解析:39.答案为B 根据第四段“The pictures were unusual because they were very lifelike.”可知 Mathew Brady拍的照片栩栩如生,因此而闻名。
[单选题]______ I should fail again, I will not give up the experiment.
Even if
解析:20.答案为C。即使我将再次失败,我也不会放弃试验。even if“即使”;even so“虽然如此”;although和though都表示“尽管”。”。
[单选题]对右主支气管的描述,下列选项错误的是 ( )
比左主支气管长
[单选题]正常机体内影响外周阻力的主要因素是 ( )
小动脉和微动脉的口径