对习惯，人们有不同的认识。你认为正确的是 ①好习惯终身受益 ②习惯有好坏之分 ③

某漂白粉的成分为次氯酸钙和氯化钙(由氯气与石灰乳恰好反应制得)，其溶液中离子浓度大小关系正确的是 [ ]

A．c(Cl^－)>c(Ca^2＋)>c(ClO^－)>c(H^＋)>c(OH^－)

B．c(Cl^－)＝c(Ca^2＋)>c(ClO^－)>c(OH^－)>c(H^＋)

C．c(Cl^－)＋c(OH^－)＋c(ClO^－)＝c(Ca^2＋)＋c(H^＋)

D．c(Ca^2＋)＝2c(Cl^－)＋2c(ClO^－)

蒸汽加温热量分布均匀，能迅速提高（），适于大型温室。

A.热量

B.室温

C.积温

D.湿度

下列包含有关发展道理的是

①士别三日，当刮目相看 ②青出于蓝而胜于蓝 ③穷则变，变则通 ④唇亡齿寒 ⑤一叶障目，不见泰山

A．①②⑤

B．①②③④

C．②③④⑤

D．①②③

阅读理解。

                                                              Heroes of Our Time

A good heart

     Dikembe Mutombo grew up in Africa among great poverty and disease. He came to Georgetown University

on a scholarship (奖学金) to study medicine-but Coach (教练) John Thompson got a look at Dikembe and had

a different idea. Dikembe became a star in the NBA, and a citizen of the United States. But he never forgot the

land of his birth, or the duty to share his fortune with others. He built a new hospital in his old hometown in the

Congo. Af friend has said of this good-hearted man:"Mutombo believes that God has given him this chance to

do great things."

Success and kindness

     After her daughter was born, Julie Aigner-Clark searched for ways to share her love of music and art with

her child. So she borrowed some equipment, and began filming children's videos (录像) in her own house. The

Baby Einstein Company was born, and in just five years her business grew to more than $20 million in sales.

And she is using her success to help others-producing child safety videos with John Walsh of the National

Center for Missing and Exploited Children. Julie says of her new program:"I believe it's the most important thing

that I have ever done. I believe that children have the right to live in a world that is safe."

Bravery and courage

     A few weeks ago, Wesley Autrey was waiting at a Harlem subway station with his two little girls when he

saw a man fall into the path of a train. With seconds to act, Wesley jumped onto the tracks, pulled the man into

the space between the rails (铁轨), and held him as the train passed right above their heads. He insists he's not

a hero. He says:"We have got to show each other some love."

1. What was Mutombo praised for?

A. Being a star in the NBA.

B. Being a student of medicine.

C. His work in the church.

D. His willingness to help the needy.

2. Mutombo believes that building the new hospital is _____.

A. helpful to his personal development

B. something he should do for his homeland

C. a chance for his friends to share his money

D. a way of showing his respect to the NBA

3. What did the Baby Einstein Company do at its beginning? 

A. Produce safety equipment for children.

B. Make videos to help protect children.

C. Sell children's music and artwork.

D. Look for missing and exploited children.

4. Why was Wesley Autrey praised as a hero?

A. He helped a man get across the rails.

B. He stopped a man from destroying the rails.

C. He protected two little girls from getting hurt.

D. He saved a person without considering his own safety.

魏晋南北朝时诸多少数民族入主中原，他们相继在中国古代北方建立了许多国家，史称“五胡十六国”其中五胡是指（）

A.匈奴、鲜卑、党项、羯族、羌族

B.匈奴、氐族、羌族、鲜卑、大夏

C.匈奴、党项、大夏、鲜卑、戎族

D.匈奴、鲜卑、氐族、羌族、羯族