A:that
B:one
C:it
D:不填
1H
+1
2He
0
3Li
4Be
+2
5B
+3
6C
+4﹣4
7N
+5﹣3
8O
﹣2
9F
﹣1
10Ne
11Na
12Mg
13Al
14Si
﹣4
15P
16S
+6﹣2
17Cl
18Ar
请分析信息并回答下列问题:
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
— What's ____ hobby?
— My father likes reading.
实验内容
实验现象
解释及结论
观察氯水的颜色、状态
呈黄绿色
①
向氯水中滴入几滴硝酸银溶液
有白色沉淀
②
用玻璃棒蘸取氯水,点在蓝色石蕊试纸上
滴有氯水的试纸中间变白,外圈变红
③