问题 选择题

用下列实验装置进行的实验中,不能达到相应实验目的的是

A.用图①所示实验装置排空气法收集H2气体

B.图②装置可以用来验证化学能转化为电能

C.图③铁片最终完全溶解,且高锰酸钾溶液褪色

D.图④所示实验可比较硫、碳、硅三种元素的非金属性强弱

答案

BC

题目分析:氢气比空气轻,浮在空气上面,则短进长出排空气时可以收集密度比空气小的气体,故A正确;图②装置不是锌铜原电池,因为没有形成闭合回路,应该用盐桥将两烧杯的溶液连接起来,故B错误;铁片不能溶解,因为常温下浓硫酸能使铁片钝化,酸性高锰酸钾溶液也不能褪色,故C错误;导管口有气泡逸出,硅酸钠溶液中有白色胶状沉淀产生,前者说明硫酸的酸性比碳酸强,后者说明碳酸的酸性比硅酸强,非金属元素的最高价含氧酸酸性越强,非金属性就越强,故D正确。

阅读理解

Andi Davise, 49, regularly crossed the trail through the Phoenix Mountains Preserve with a few other hikers before sunrise. This morning, however, she met nobody and heard only the sounds of animals.

Some time later, Andi got to the steep slope(陡坡), she climbed up to the top by using her hands. When she finally reached the top, she noticed a dark shape several inches from her left foot. She was frightened and then looked carefully. "It's a dog and it's dead." she said to herself. It took her a few seconds to realize that the dog's eyes were open. A thin, dirty bull dog was looking at her.

She greeted in a low and soft voice to show she was friendly. The bull dog shook when he heard her voice.

Andi inched closer and dropped some water into the dog's mouth. He tried to stand up but failed. Something was wrong with his left front leg. Andi pulled out her phone to contact her husband, Jason, but he didn't respond. She knew that if she didn't carry the dog down the mountain, he would die.

She carefully put her arms under the dog's body. He was so weak that he fell into her chest.

Andi had great trouble going down the steep, rocky mountainside with the 50-pound animal in her arms. Even her arms and back started aching, she didn't give up. The trip up had taken 30 minutes while going back down took twice that.

Andi's husband received her messages at last. He and their son, Justin, jumped into the car and drove to pick up Andi.

Later that morning, an X-ray showed that the bull dog was badly hurt, he was likely to lose his left leg.

A few days later, the Davises returned to the animal hospital. "The first thing he did was to give me a kiss, then he went right to my son." Andi said. They named the dog Elijah and brought him home that day.

小题1:How did Andi get to the top of the mountain?

A.Her husband sent her.

B.Another hiker helped her.

C.She climbed by herself.

D.She reached there by car小题2:What does the underlined word "respond', in Paragraph 4 mean?

A.Pull.

B.Contact.

C.Speak.

D.Answer.小题3:Which of the following is the correct order?

a. Audi found a dying dog on the top.

b. Andi climbed up the steep slope.

c. The Davises brought the dog home.

d. Andi had much trouble carrying the dog down.

e. The Davises drove the bull dog to the hospital.

A.badce

B.badec

C.abdce

D.adbec小题4: The best title should be "________".

A.A woman hiker saved the life of a 50-pound bull dog

B.A woman hiker carried a bull dog down the mountain

C.A woman hiker got on well with a 50-pound bull dog

D.A woman hiker found a 50-pound dog on the mountain

单项选择题