分部分项工程的工程量计算单位应与现行定额手册中所规定的（）一致。A.单位 B.定额

下列各组离子在指定的环境中一定能大量存在的是

A．在pH=1的无色溶液中： K⁺、Na⁺、NO₃^-

B．在含碳酸钠的溶液中：NH₄⁺、Fe³⁺、NO₃^-

C．在能使紫色石蕊试纸变蓝色的溶液中：Na⁺、Cu²⁺、S^2-

D．由水电离出的c(H⁺)=1×10^-12 mol·L^－1的溶液中：K⁺、Na⁺、OH^-

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

对于绒毛膜促性腺激素哪项是恰当的（）

A.孕妇尿中hCG于12周后迅速下降，是妊娠黄体萎缩的结果

B.是一种甾体激素

C.hCG的分泌受卵巢所分泌的雌激素、孕激素的影响

D.妊娠期子宫蜕膜的维持主要是hCG的直接作用

E.hCG的生物活性与黄体生成素相似

什么是惯用法？在惯用法中系统最大过电压、绝缘耐受电压与安全裕度三者之间的关系是什么？

上海大众1.4TSI发动机的功率扭矩强劲，主要是和竞争对手的（）L的自然吸气发动机进行抗衡。

A.1.8L

B.2.0L

C.2.2L

D.2.4L