如图为美国学者米勒模拟原始地球条件和大气成分的实验装置.此实验说明_刷题宝

题干

如图为美国学者米勒模拟原始地球条件和大气成分的实验装置.此实验说明（）

A：原始地球能形成原始生命

B：原始地球能形成构成生物体的有机物

C：生命起源于原始大气

D：紫外线等自然条件的长期作用形成原始生命

上一题下一题 0.0难度选择题更新时间:2019-11-22 04:12:28

答案(点此获取答案解析）

B

同类题1

. Everyone must have known the death of the waitress，________?

同类题2

用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。

hair, never, old, newspaper, play, but, can't, get, glasses, build

My grandfather is seventy years old, ____ he is still very healthy. He is tall and of medium ____ . He has short straight white ____ He likes reading. Every morning he ____ up very early and then reads morning ____ . When he reads, he always wears ____ . He also likes ____ chess, too. He always plays chess with his ____ friends. He ____ plays chess with me. Why? Because I ____ play chess.

同类题3

—Peter, would you mind moving your bike?

—Sorry, Mrs. Smith! I'll do it i____

同类题4

选用括号内的试剂或方法鉴别下列各组物质，其中不正确的是（）

同类题5

某发明爱好者发现口香糖污渍很难清除，因此在研究性学习活动中设计制作了一款便携式口香糖污渍清除器，并提交了专利申请。下列说法中不正确的是（）

小学学科试题库

初中学科试题库

高中学科试题库