某学生对SO2与漂粉精的反应进行实验探究: 操作现象取4g漂粉精固体,加入100

题型:填空题

问题:

某学生对SO2与漂粉精的反应进行实验探究:

操作现象
取4g漂粉精固体,加入100mL水部分固体溶解,溶液略有颜色
过滤,测漂粉精溶液的pHpH试纸先变蓝(约为12),后褪色
液面上方出现白雾;

稍后,出现浑浊,溶液变为黄绿色;

稍后,产生大量白色沉淀,黄绿色褪去

(1)C12和Ca(OH)2制取漂粉精的化学方程是         

(2)pH试纸颜色的变化说明漂粉精溶液具有的性质是         

(3)向水中持续通入SO2,未观察到白雾。推测现象i的白雾由HC1小液滴形成,进行如下实验:

a.用湿润的碘化钾淀粉试纸检验白雾,无变化;

b.用酸化的AgNO3溶液检验白雾,产生白色沉淀。

① 实验a目的是      

②由实验a、b不能判断白雾中含有HC1,理由是        

(4)现象ii中溶液变为黄绿色的可能原因:随溶液酸性的增强,漂粉精的有效成分和C1-发生反应。通过进一步实验确认了这种可能性,其实验方案是      

(5)将A瓶中混合物过滤、洗涤,得到沉淀X

①向沉淀X中加入稀HC1,无明显变化。取上层清液,加入BaC12溶液,产生白色沉淀。则沉淀X中含有的物质是     

②用离子方程式解释现象iii中黄绿色褪去的原因:        

考点:单质硫金属硫化物二氧化硫三氧化硫
题型:填空题

第三代头孢菌素的特点,叙述错误的是()

A.体内分布较广,一般从肾脏排泄

B.对各种β-内酰胺酶高度稳定

C.对G菌作用不如第一、二代

D.对绿脓杆菌作用很强

E.基本无肾毒性

题型:填空题

刘波刚买入的某股票,价格为40元,它最近12个月的收益是每股4元,其中有2元已经作为股利被支付给股东,如果预期盈利增长率为每年8%,必要回报率为12%,那么该股票合理的市盈率(非实际市盈率)为( )倍。

A.10.00

B.12.50

C.13.50

D.50.00

题型:填空题

阅读下面的短文,并根据短文后面的要求答题(请注意问题后的词数要求)。

What is the hottest topic at your school recently? In Hangzhou Yongjin Middle School, it’ s money.

The school held an activity called “making money” last weekend. About 200 Junior 1 and Junior 2 students were divided into 30 teams. They went out ___________________________. What did they choose to sell? Some sold newspapers;some chose bottled water;some sold environmentally friendly shopping bags and bamboo baskets.

Hu Qing’s team decided to sell some useful books in front of the Children Activity Center. They thought parents would like to buy the books for their children. But unfortunately, they met urban management officers. The officers asked them to leave. “We played hide-and-seek with the offices for the whole morning,” said Hu. “Finally we had to give up.”

Wang Bing and her team sold ice cream in a square. They didn’t meet any officers. But few people were interested in what they were selling. The team then put up a board saying “For Country Kids”. It worked. More people came to their stall(小摊). A foreigner even gave them 100 Yuan. “He didn’t want any change. He said he wanted to help the children,” said Wang. “We were touched.” Later that day they gave the 100 Yuan and more to the “Project Hope” office.

Meng Zhaoxiang and his team were luckier. They sold all their cakes in four hours, spending 39.5 Yuan and getting back 80 Yuan. They made 40.5 Yuan. “It was not easy to make the money,” said Meng. “Some people just looked. Others just tasted but didn’t buy. Now I know how hard it is for our parents to make money we need to lead happy lives. ”

小题1:. What is the main idea of the text? (No more than ten words)

_________________________________________________________________________

小题2:.Fill in the blank in Paragraph 2 with proper words. (No more than ten words)

_________________________________________________________________________

小题3:. What does the underlined “it” in Paragraph 4 refer to?

_________________________________________________________________________

小题4:. What is the writer’s attitude towards the activity?

_________________________________________________________________________

小题5:.What is the purpose of holding the activity? (No more than twelve words)

_________________________________________________________________________

题型:填空题

阅读教材中的一段古文,完成下面问题:

 求人可使报秦者。……相如曰:“王必无人,臣愿奉璧往使。城入赵而璧留秦;城不入,臣请完璧归赵。”赵王于是遂遣相如奉璧西入秦。

  秦王坐章台见相如。……相如因持璧却立,倚柱,怒发上冲冠,谓秦王曰:“大王欲得璧,使人发书至赵王,赵王悉召群臣议,皆曰:‘秦贪,负其强,以空言求璧,偿城恐不可得。’议不欲予秦璧。臣以为布衣之交尚不相欺,况大国乎?且以一璧之故逆强秦之欢,不可。于是赵王乃斋戒五日,使臣奉璧,拜送书于庭。何者?严大国之威以修敬也。今臣至,大王见臣列观,礼节甚倨,得璧,传之美人,以戏弄臣。臣观大王无意偿赵王城邑,故臣复取璧。大王必欲急臣,臣头今与璧俱碎于柱矣!”……

   相如度秦王特以诈佯为予赵城,实不可得,乃谓秦王曰:“和氏璧,天下所共传宝也。……”秦王度之,终不可强夺,遂许斋五日,舍相如广成传舍。……

  秦王斋五日后,乃设九宾礼于廷,引赵使者蔺相如。相如至,谓秦王曰:“秦自缪公以来二十余君,未尝有坚明约束者也。臣诚恐见欺于王而负赵,……唯大王与群臣孰计议之!”

  ……

1.与“相如度秦王特以诈佯为予赵城”中“以”意义相同的一句是 [ ]

A.空言求璧,偿城恐不可得

B.何者?严大国之威修敬也

C.武始元六年春至京师

D.且一璧之故逆强秦之欢

2.下列加线字中,与“城不入,臣请璧归赵”中的“完”活用相同的一项是 [ ]

A.舍相如广成传

B.得见汉使

C.空以身草野

D.大 * * 邓骘其才

3.下列句子中与“臣诚恐见欺于王而负赵”句式相同的一项是 [ ]

A.求人可使报秦者

B.汉天子我丈人行也

C.自书典所记,未之有也

D.皆为陛下所成就

题型:填空题

消化管的一般组织结构如何?

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