短文填词 Beijing's Hutong is attracted by t

问题填空题

短文填词

Beijing's Hutong is attracted by tourists. In the past twenty
years it has changed greatly, but it changes________
a way, you can s________see the history of it, see
the culture of it, see the tradition of it.People in Beijing
have________we call the closeness to each other.
They are like________(社区). Everyone knows
everyone________. At 6 o'clock in summer time,
people are outside their houses, s________on small
chairs and playing Chinese checkers and having tea,
talking to each other. Beijing is________(建立) on
the v________sense of communication, of feelings,
of knowing each other. A stranger walks in the street
and the________(整个) street will know this person
as a stranger. Hutong is a place of_m________friends.

1.________
2.________
3.________
4.________
5.________
6.________
7.________
8.________

9.________
10.________

答案

1. in 2. still 3. what 4. communities 5. else 6. sitting 7. built 8. very 9. whole 10. making

编号	操作	现象	解释
A	FeI₂溶液中滴加过量氯水	溶液变黄	氯水氧化I^-成碘单质，碘水呈黄色： 2I^-＋Cl₂＝I₂＋2Cl^-
B	苯酚钠溶液中通入少量CO₂	出现白色浑浊	苯酚酸性弱于碳酸，反应生成苯酚： 2C₆H₅O^-＋CO₂＋H₂O＝2C₆H₅OH＋CO₃^2-
C	Ca(HCO₃)₂溶液中滴加过量NaOH溶液	出现白色沉淀	Ca²⁺＋HCO₃^-＋OH^-＝CaCO₃↓＋H₂O
D	含有等浓度的Mg²⁺和Cu²⁺的废水液中逐滴加入少量NaOH溶液调节溶液pH=7	溶液中先出现蓝色沉淀	K_sp［Cu(OH)₂］< K_sp［Mg(OH)₂］，因此Cu²⁺先沉淀；Cu²⁺＋2OH^-＝Cu(OH)₂↓