问题
多项选择题
下列关于铜电极的叙述,正确的是()。
A.铜锌原电池中铜是正极
B.用电解法精炼粗铜时粗铜做阴极
C.用电解法精炼粗铜时纯铜做阴极
D.在镀件上电镀铜时可用金属铜做阳极
答案
参考答案:A, C, D
下列关于铜电极的叙述,正确的是()。
A.铜锌原电池中铜是正极
B.用电解法精炼粗铜时粗铜做阴极
C.用电解法精炼粗铜时纯铜做阴极
D.在镀件上电镀铜时可用金属铜做阳极
参考答案:A, C, D
选择正确的词填空,可重复使用。
—Yes, she does. 2.—_____ you spell the word? —Sorry, I can't. 3._____his grandparents like vegetables? 4.—Where_____ I? —You_____ in a new place. 5.—What_____your uncle love7 —He loves sports. 6. I _____a student. My name_____Li Hong. 7. She_____my friend. Her name_____Wang Mei. 8. —Where_____ your balls? —They _____under the bed 9.—_____ those apples? —Yes, they _____. 10. On Sunday, I _____ watch TV. I must (必须) do my homework (作业). |