问题 阅读理解

Thank you for your interest in helping animals! Volunteering is a wonderful way to learn, have fun and give back to your community(社区). There are many ways to care for the animals at PAWS.

Youth Work Party

If you are ten years or older, you can join the Youth Work Party Team with a parent to work on different projects around PAWS in Lynnwood, WA. For example, you can build boxes for frightened, injured wildlife to hide in. Ask your parent to sign up to join a work party. If you are eighteen years or older, you can join the Youth Work Party Team independently.

PAWSwalk

PAWSwalk is our biggest fundraising(筹款)event of the year, held at the end of the summer to raise money to care for the animals. You can collect money with the help of your family, friends and school, and then walk in the event.

Cookie Sale

Selling homemade dog cookies is a wonderful way to help the animals. PAWS can provide brochures(小册子)to give out when you sell the cookies prepared by you and your parents, so people can learn about PAWS at the same time. You can find homemade dog cookie cooking instructions on the Internet or by checking out cookbooks for dogs at the library.

Movie Night

Invite friends, family, neighbors and classmates to watch your favorite animal movie, like Babe or Charlotte’s Web. Ask them to bring an “entrance fee” of donations or supplies for the animals.

Thanks again for your interest in PAWS and helping animals. Share your ideas with your parents and invite a few friends to join you in helping make a difference for animals. If you have any questions, call 425-787-2500-261.

小题1:Who may work in the Youth Work Party Team by himself/herself ?

A.A ten-year-old student.

B.A thirteen-year-old student.

C.A sixteen-year-old student.

D.A nineteen-year-old student.小题2:If a child wants to take part in Cookie Sale, he/she needs to _____.

A.sell cookbooks for dogs

B.cook and sell dog cookies

C.sell cookies made by PAWS

D.offer brochures about cookies小题3:Which of the following takes place in the summer ?

A.Youth Work Party.

B.PAWSwalk

C.Cookie Sale

D.Movie Night.小题4:It can be inferred that PAWS might be _____.

A.a skill training program for youths

B.a series of cookbooks for dogs

C.an animal protection organization

D.a community center for children

答案

小题1:D

小题2:B

小题3:B

小题4:C

讲述了一个保护动物组织的一系列活动。

小题1:细节题。根据第二段最后一行If you are eighteen years or older。可知D符合要求。

小题2:细节题。根据第四段内容Selling homemade dog cookies is a wonderful way to help the animals.

小题3:细节题。根据第三段1,2行PAWSwalk is our biggest fundraising(筹款)event of the year, held at the end of the summer to raise money to care for the animals.

小题4:推断题。通读全文根据这个组织的适应活动,可以推断这是应该保护动物的组织。

填空题

二氧化氯(ClO2)是目前国际上公认的第四代高效、无毒的消毒剂,是一种黄绿色的气体,易溶于水。

Ⅰ.(1)ClO2可由KClO3在H2SO4存在的条件下与Na2SO3反应制得。则该反应的氧化产物与还原产物的物质的量之比是________。

Ⅱ.实验室也可用NH4Cl、盐酸、NaClO2(亚氯酸钠)为原料制备ClO2,其流程如下:

(2)写出电解时发生反应的化学方程式:________________________________。

(3)除去ClO2中的NH3可选用的试剂是________。(填序号)

A.饱和食盐水

B.碱石灰

C.浓硫酸

D.水(4)测定ClO2(如图)的过程如下:在锥形瓶中加入足量的碘化钾,用100 mL水溶解后,再加3 mL硫酸溶液;在玻璃液封管中加入水;将生成的ClO2气体通过导管在锥形瓶中被吸收;将玻璃封管中的水封液倒入锥形瓶中,加入几滴淀粉溶液,用c mol·L-1硫代硫酸钠标准溶液滴定(I2+2S2O32-=2I+S4O62-),共用去V mL硫代硫酸钠溶液。

①装置中玻璃液封管的作用是______________________________________。

②请写出上述二氧化氯气体与碘化钾溶液反应的离子方程式__________________________。

③滴定终点的现象是_______________________________________________。

④测得通入ClO2的质量m(ClO2)=________。(用含c、V的代数式表示)

(5)用ClO2处理过的饮用水(pH为5.5~6.5)常含有一定量对人体不利的亚氯酸根离子ClO2-。2001年我国卫生部规定,饮用水的ClO2-含量应不超过0.2 mg·L-1。若饮用水中ClO2-的含量超标,可向其中加入适量的某还原剂,该反应的氧化产物是________(填化学式),其发生反应的离子方程式为_________________________________________________________________。

单项选择题