A:电子从锌电极通过电流表流向铜电极
B:盐桥中的阴离子向硫酸铜溶液中迁移
C:取出盐桥后,电流计的指针仍发生偏转
D:铜电极上发生的电极反应是2H++2e﹣═H2↑
虽为毫末技艺,都是顶上功夫。(理发店广告楹联)
根据短文内容,选出一个最佳答案填入题前的括号内。
Name
Personal Information
Norman Bethune
Born in 1890 in Canada
A doctor
Came to China in1938
Died in 1939 in China
Celine Dion
Born in Montreal, Canada
A singing star
In 1997, sang My Heart Will Go On for the film Titanic
Thomas Edison
Born in 1847, Kentucky, USA
Made over 1,000 inventions
Died in 1931
Bill Gates
Born in 1955 in the USA
Wrote Business @ the Speed of Thought
Owns Microsoft Company
Mark Twain
Born in 1835 in the USA
A writer
Wrote the Adventure of Tom Sawyer
Died in 1910
读我国四大地理区域(如图),回答
从图中观察,流经三大地理区域的河流是( )