第一章 单元测试

1、 问题:Mixtures and pure substances can be separated by physical.( )
选项:
A:对
B:错
答案: 【


2、 问题:Celsius is the unit of the temperature.( )
选项:
A:对
B:错
答案: 【

3、 问题:Systematic errors caused by limitations in an experimenter’s skill or ability to read a scientific instrument. ( )
选项:
A:对
B:错
答案: 【

4、 问题:In physical change, some of the physical properties of the sample may change, and its composition changed.( )
选项:
A:对
B:错
答案: 【

5、 问题:There is a temperature at which °C and °F have the same value.( )
选项:
A:对
B:错
答案: 【

第二章 单元测试

1、 问题:Cathode rays are deflected (偏转) in an electric field( )
选项:
A:对
B:错
答案: 【

2、 问题:STP usually refers to the temperature of 0℃ and the pressure of 101.325 kPa( )
选项:
A:对
B:错
答案: 【

3、 问题:Alkali metals are all first period elements( )
选项:
A:对
B:错
答案: 【

4、 问题:There are as many electrons outside the nucleus as there are units of positive charge on the nucleus. The atom as a whole is electrically neutral( )
选项:
A:对
B:错
答案: 【

5、 问题:X-rays are harmless to the human body( )
选项:
A:对
B:错
答案: 【

第三章 单元测试

1、 问题:The oxidation state of the underlined element KO2 is -1/2.( )
选项:
A:对
B:错
答案: 【


本门课程剩余章节答案为付费内容
本文章不含期末不含主观题!!
本文章不含期末不含主观题!!
支付后可长期查看
有疑问请添加客服QQ 2356025045反馈
如遇卡顿看不了请换个浏览器即可打开
请看清楚了再购买哦,电子资源购买后不支持退款哦