下列关于比重计说法正确的是( )。A.锤度计的刻度表示20℃下溶液内表观纯蔗糖的质

题型:多项选择题

问题:

下列关于比重计说法正确的是( )。

A.锤度计的刻度表示20℃下溶液内表观纯蔗糖的质量分数

B.普通比重计的刻度近尾部读数小

C.酒精比重计的刻度直接表示20℃下溶液内乙醇的质量分数

D.波美比重计轻表用于测定相对密度小于1的液体

考点:食品检验工初级食品检验工初级
题型:多项选择题

I’m Jack, and I am a middle school student. Yesterday was the most exciting day in my life. I was on TV! This is my first time on TV. In the evening, Mum, Dad and I were watching a TV programme in the sitting room and there I was! This is how it happened.

I was playing soccer in the park with my friends when a man and a woman came to us. The man had a camera. The woman had a microphone. “I’m from Channel 9,” she said. “Do you know the programme Kid’s Speak Out?” I did know it. I watched it often. It’s a weekly programme where kids say what they think about different things.

“Would you like to be on it?” the woman asked me.

I wanted to be on it and I thought my friends might also want to be on it, so I asked, “Can my friends be on it too?”

“Sorry, only one of you can,” the woman said. “You can talk about it and decide which of you is going to be on the programme.”

I asked my friends if they wanted to be on the programme. They didn’t, so I went on it. The woman asked me a lot of questions. I thought carefully and tried to give sensible answers. When she finished, she said I was one of the best kids she’d spoken to! I felt very proud of myself. My mum and dad were proud of me too!

小题1:Jack was excited yesterday because he           .

A.watched a TV programme with his parents

B.was on TV for the first time

C.played soccer in the park with his friends

D.saw the hosts of the programme Kid’s Speak Out小题2:How did the thing happen?

①Jack asked his friends if they wanted to be on the programme.

②The woman asked Jack if he’d like to be on the programme.

③The woman asked Jack a lot of questions.

④Jack played soccer in the park with friends.

⑤Jack thought carefully and tried to give answers.

A.④①③②⑤

B.④②①③⑤

C.④③②①⑤

D.④⑤③①②小题3:What does the word sensible mean in the passage?

A.明智的

B.可能的

C.合理的

D.正确的小题4:What can we know about Jack from the passage?

A.Jack’s parents were proud of him.

B.Jack was the top student at school.

C.Jack was afraid to be on the programme.

D.Jack never watched the programme Kid’s Speak Out.

题型:多项选择题

His sister left home in 1998, and ________ since. [ ]

A. had not been heard of

B. has not been heard of

C. had not heard of

D. has not heard of

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我国政府把“切实保护耕地”作为一项基本国策的原因是(  )

A.后备土地资源不足

B.土地资源类型齐全

C.存在浪费、不合理使用土地等现象

D.人口众多,粮食需求量大

题型:多项选择题

为研究物质的某种特性,某同学测得四组数据,填在下表中

实验次数物体质量(g)体积(cm3)质量/体积(g/cm3)
1铝块154202.7
2铝块2108402.7
3松木1108216______
4松木210______0.5
(1)将上表中的空白处填写完整.

(2)比较第1、2两次实验数据,可得出结论:同一种物质,它的质量跟它的体积成______.

(3)比较第2、3两次实验数据,可得出结论:质量相同的不同物质,体积是______;

(4)比较1、4两次实验数据,可得出结论的是:______.

题型:多项选择题

下列化合物与格氏试剂反应,能用于制备仲醇的是( )

A.丙醛
B.丙酮
C.环氧乙烷
D.二氧化碳

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