下列各组物质的分类正确的是（）_刷题宝

题干

下列各组物质的分类正确的是（）

A：同位素：¹H⁺、²H₂、³H

B：同系物：丙烷、异丁烷、新戊烷

C：电解质：冰醋酸、水银、烧碱

D：酸性氧化物：一氧化氮﹑二氧化碳、三氧化硫

上一题下一题 0.0难度选择题更新时间:2018-04-26 11:20:43

答案(点此获取答案解析）

B

同类题1

选择合适的词填空。

doesn't chores make feed will going wash set homework trash

Jack has to do some ____ at home this week, because his mom is ____ on a trip to Beijing. Every morning he has to ____his bed but he ____ have to make dinner. He doesn't have to take out the ____, because his father ____ do that. In the evening, Jack has to ____ the table and then ____ the dishes. He doesn't have to ____ his fish but he has to do his ____!

同类题2

The boy was lucky enough to have escaped _____for being late for school .

同类题3

如果你用绳子拴住一个小球使它在光滑的水平面上做圆周运动，当绳子突然断裂后，小球将（）

同类题4

甲、乙两只机械手表放在凸透镜的主轴上，位置如图所示，手表的盘面正对透镜，跟主轴垂直，若从透镜的另一侧的适当位置，通过透镜观察手表，则观察到秒针旋转方向应是（）

同类题5

如图所示细胞中所含的染色体，下列叙述正确的是（　　）

小学学科试题库

初中学科试题库

高中学科试题库