燃烧范围宽易点火着火,爆炸下限较低极易发生着火爆炸。

题型:判断题

问题:

燃烧范围宽易点火着火,爆炸下限较低极易发生着火爆炸。

考点:炼焦工艺与设备炼焦生产炼焦生产题库
题型:判断题

女孩进入青春期较男孩约()

A.晚1年

B.晚2年

C.相同年龄

D.早1年

E.早2年

题型:判断题

已知关于x的二次多项式a(x3-x2+3x)+b(2x2+x)+x3-5,当x=2时,多项式的值为-17,求当x=-2时,该多项式的值.

题型:判断题

阅读理解

     It was Thanksgiving morning. I was busy preparing the traditional Thanksgiving turkey when the

doorbell rang. I opened the front door and saw two small children in rags huddling together on the

top step.

     "Any old papers, lady?" asked one of them.

     I was busy. I wanted to say "no" until I looked down at their feet. They were wearing thin little

sandals(凉鞋), wet with heavy snow.

    "Come in and I'll make you a cup of hot cocoa."

     They walked over and sat down at the table. Their wet sandals left marks upon the floor. I served

them cocoa and bread to fight against the cold outside. Then I went back to the kitchen and started

cooking.

     The silence in the front room struck me. I looked in. The girl held the empty cup in her hands,

looking at it. The boy asked in a flat voice, "Lady, are you rich?"

     "Am I rich? Pity, no!"

     I looked at my wornout slipcovers(椅套). The girl put her cup back in its saucer(茶碟)carefully

and said, "Your cups match your saucers." They left after that, holding their papers against the wind.

They had reminded me that I had so much for which to be grateful.

    Plain blue china cups and saucers were only worth five pence. But they matched.

     I tasted the potatoes and stirred(搅动)the meat soup. Potatoes and brown meat soup, a roof over

our heads, my man with a regular job, these matched, too.

     I moved the chairs back from the fire and cleaned the living room. The muddy marks of little

sandals were still wet upon my floor. Let them be for a while, I thought, just in case I should begin to

forget how rich I am.

1. Which of the following would be the best title for the text?

A. Lady, are you rich?

B. A story of Thanksgiving Day

C. Don't forget how rich you are

D. Does cups and saucers match well?

2. The writer let the two children come in and served them well because________.

A. she wanted to sell old papers to them

B. she wanted to invite them to her Thanksgiving party

C. she showed great pity and care on them

D. she had the same experience as them in the past

3. Which of the following statements is NOT true according to the passage?

A. The girl thought the writer was rich just because she wanted to make the writer happy.

B. The writer had thought she wasn't rich because her supplies were not expensive.

C. If cups and saucers match well, they are a best pair even though cheap.

D. After hearing what they said, the writer seemed to understand what a rich life was.

4. The writer left the muddy marks of little sandals on the floor for a while to________.

A. show that she was a kindhearted lady

B. remind her that she shouldn't forget how rich she was

C. leave room for readers to think about what being rich is

D. prove that she had understood what meant being rich

5. It can be inferred from the text that whether you are rich depends on________.

A. how much money you have made

B. what attitude you have had towards life

C. the way you help others

D. your social relationship

题型:判断题

关于编制矿井设计应依据的材料,说法不正确的是()。

A.国家和部门设立的规范 

B.地质勘察成果 

C.政府、部门或甲方的委托协议 

D.批准的矿区总体设计

题型:判断题

招标投标制度在大胆探索和创立期的特点不包括( )。

A.招标投标基本原则初步确立,但未能有效落实

B.招标领域逐步扩大,但进展得很不平衡

C.各种招标投标规定较为全面,但非常简略

D.对外开放程度逐步捉高

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