题目内容

【题目】有下列物质:二氧化碳 硝酸钾晶体 液氯 氢气 氯水 石墨 氢氧化钠固体 稀硫酸 熔融氯化钠 铝。

请用序号回答下列问题:

(1)属于混合物的是__________;属于非金属单质的是___________。

(2)属于电解质的是__________;能够导电的是____________。

(3)能与稀盐酸发生氧化还原反应的是__________;该反应的离子方程式为____________________。

【答案】(1)⑤⑧(1分) ③④(1分) (2)②⑦⑨(1分) ⑤⑥⑧⑨⑩(1分)

(3)(1分) 2Al+6H+===2Al3++3H2↑(2分)

【解析】二氧化碳是化合物,不能电离产生自由移动的离子,是非电解质,不能导电;硝酸钾晶体是盐,属于电解质,由于离子不能自由移动,因此不能导电;液氯是非金属单质,由分子构成,不能电离产生自由移动的离子,因此不能导电;氢气是非金属单质,由分子构成,不能电离产生自由移动的离子,因此不能导电;氯水是氯气的水溶液,是混合物,含有HCl和次氯酸,它们电离产生自由移动的离子,因此可以导电;石墨是非金属单质,含有自由移动的电子,可以导电;氢氧化钠固体是碱,属于电解质,由于含有的离子不能自由移动,因此不能导电;稀硫酸是硫酸的水溶液,属于混合物,硫酸电离产生大量自由移动的离子,因此可以导电;熔融氯化钠是盐,属于电解质,该物质是离子化合物,在熔融状态下电离产生自由移动的离子,因此可以导电;铝是金属单质,含有自由移动的电子,因此可以导电。(1)在上述10种物质中,属于混合物的是⑤⑧;属于非金属单质的是③④⑥。(2)属于电解质的是②⑦⑨;能够导电的是⑤⑥⑧⑨⑩。(3)能与稀盐酸发生氧化还原反应的是铝,反应方程式是2Al+6HCl===2AlCl3+3H2↑,离子方程式是2Al+6H+===2Al3++3H2↑。

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【题目】A

When an earthquake hit a small town, many houses fell down. After the earthquake, all the newspapers reported many-stories about some of the families who were in trouble.

One Sunday, when I was reading a newspaper, a special picture touched me. It gave the clothing sizes of each family member. I thought that this would be a good chance to teach my children to help those who were less lucky than themselves. I said to my seven-year-old twins, Brad and Brett, and three-year-old daughter, Meghan, We have so much, but these poor people now have nothing. Well share what we have with them.

I filled a box with foods and clothes. While I was doing this, I encouraged the children to choose their toys and donate some of their less favorite things. Meghan watched quietly as the boys took out their old toys and games and put them together. Then she walked away. A few minutes later she came back with Lucy, her much-loved doll. She put the doll on top of the other toys. Oh, dear, I said, you dont have to give Lucy. You love her so much. Meghan said, Lucy makes me happy, Mommy. Maybe shell make another little girl happy, too.

I looked at Meghan for a long moment. She taught me a lesson. Its easy to give something that we dont want any more, but hard to give what we cherish, isnt it?

【1】According to the passage, the writer has___________ children.

A. one span>B. two C. three D. four

【2】 The underlined word donate probably means___________.

A. 捐赠 B. 丢掉 C. 展出 D. 放好

【3】Which of the following is TRUE?

A. An earthquake happened in the writers hometown.

B. The writer let Meghan give her much-loved doll.

C. The writer decided to buy some clothes for those people in trouble.

D. The writer thinks it is more difficult to give what we love a lot.

【4】 Whats the best title of this passage?

A. A Family Story. B. The Spirit of Giving.

C. The Way of Helping Others. D. A Sad Experience.

【题目】A

WISDOM MISSION SCHOOL ADMISSION PROCEDURE

FOR JR. HIGH/HIGH SCHOOL STUDENTS

Thank you for choosing Wisdom Mission School for your childs future. We are committed to provide quality education with love.

Prospective US residents are welcome to apply for admission by submitting the following documents via e-mail, fax, and US mail to Wisdom Mission School:

Wisdom Mission School

Admission Office

5851 Newman St.

Cypress, CA 90630

Contact us if you have any question:

Phone: 1-714-995-1900 1-562-833-2070

Fax: 1-714-995-1910

E-mail: wms.edu@gmail.com

Required Documents for Jr. High/High School Students (Click to Download Forms)

Admission Application

Student Agreement (Rules and Regulations)

Transcript (Sent directly by previous school)

Essay on the reason for Admission to Wisdom Mission School

After you submit all the documents, admission is approved.

Enrollment Agreement along with Tuition/Fees Payment.

Elementary

(K6th)

Jr. High

(7th—8th)

High

(9th—12th)

Tuition

$450×11 Payments

$540×11(Honors)

$900×10(Regular)

$9,000 or $900×10 Payments

Enrollment Fee

$600($300/2nd child, $200/3rd child)

$700

Other Fee

None

$500

Re-registration Fee

Paid by April 1st: $100

Paid after April 1st: $150

None

【1】What do students have to get from their previous school?

A. Transcript. B. Student agreement.

C. Essay. D. Admission application.

【2】 If your admission is approved you will ____________.

A. fax to 1-714-995-1910

B. finish the enrollment agreement along with Tuition/Fee Payment

C. click to download forms

D. complete the forms

【3】How much is the Enrollment Fee if one couple has three children, and two will go to Elementary and another will attend High in Wisdom Mission School?

A. $1,100. B. $1,300. C. $1,600. D. $1,800.

【题目】B

People are interested in eating raw and whole foods (天然健康食品). They are usually digested more efficiently than cooked and processed foods. When we cook foods, we destroy the natural enzymes (酶) that are part of the food in its raw form. These enzymes were intended by nature to help us digest the food. When we consume food without these natural enzymes, our bodies either digest the food improperly or allow too many nutrients (营养) to be absorbed into the blood. In both cases, the result is obesity.

Processed foods contain chemical elements, which might confuse the stomach that tells us when we’ve had enough to eat; as a result, people often overeat. Processed foods also upset the digestion cycle. Then, the body’s metabolism (新陈代谢) becomes inactive, and the result is weight gain and obesity.

To stop this vicious circle in its tracks, people need to have healthy food that will balance the body. Eating the right types of raw and whole foods can help. It’s also important to restore our enzyme balance. We need to tell and avoid the foods that cause negative effects and eat the foods that increase enzyme production. If we truly want to change and help our body heal itself, we need to take an active approach.

【1】What can we learn from Paragraph 1?

A. It is essential for us to digest some fat.

B. Cooked and processed foods are healthier.

C. Foods with natural enzymes help us keep fit.

D. Absorbing many nutrients is beneficial to our health.

【2】Processed foods will probably __________.

A. stop body’s metabolism B. be difficult to digest

C. destroy body’s cells D. lead to obesity

【3】 What does the underlined word “vicious” in the last paragraph mean?

A. Harmful. B. Violent.

C. Automatic. D. Positive.

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