The leader should every suggestion worthy

蛋的内外壳膜在输卵管（）形成。

A、峡部

B、子宫部

C、 * * 部

D、喇叭部

（1）如图所示，小明将一枚硬币放在碗的底部，眼睛在A处恰好看不到它，这是因为光的   现象。沿碗壁缓缓向碗中加水，小明在A处又看到硬币，这是利用了光的     现象，此时小明看到的是硬币的      (选填“虚”或“实”）像。

（2）如图所示，在水平桌面上放置一个硬币并沿箭头所示方向吹气，发现有几次“硬币起飞”了，小明思考产生这一现象的原因：通过硬币上部空气流速大，压强       ；而硬币下面没有气流通过，下方气压始终是p₀，从而产生压力差，给硬币一个向上的动力。

（3）“硬币起飞”的条件是什么呢？查寻规律：在地面附近同一高度或高度差不显著的情况下，空气流速v与压强p的关系可表示为1/2ρv²＋p = p₀（其中ρ表示空气密度，p₀是常数，表示没有气流时的环境气压）。本研究需要知道硬币的质量m（或重力G）和硬币上（或下）表面面积S。

（4）小明同学用如图所示的方法测定硬币表面面积，图中刻度尺的示数为     cm ，由此测得硬币的直径，算出硬币的表面积S。

（5）先利用天平称出多个硬币的总质量，然后计算出单个硬币的质量。(4)(5)两次实验中用了同一种方法测物理量，这样做的目的是                         。

（6）请导出刚好将硬币吹起时吹气速度v的表达式 v=_____ ____（用ρ、S、m表示）。

下列电化学发光免疫分析的特点中错误的是（）

A.发光剂可周而复始地发光

B.发光剂可直接标记抗体或抗原

C.灵敏度高

D.稳定性好

E.可改变标志物的化学特性

阅读理解。

     Everyone has an ambition (志向) to travel. But those who cannot do so themselves might find it interesting

to work in a travel agency (旅行社), arranging journeys for other people. Brain Lawley does this, working in

a small travel agency in an industrial city. Most of his work is concerned (有关) with holidays, both at home

and abroad. Every autumn, the agency sends out hundreds of booklets (小册子)full of attractive coloured

photographs, describing the holidays that their customers will be able to have next year. Soon people begin to

come into the office to book their holidays: perhaps a week's skiing in Austria in January, perhaps a cruise (巡

游) to the Caribbean in February, perhaps a seaside holiday in Spain in May, or a tour to North Africa, Brain

often has to advise people on what holidays will be suitable for them, and they always have a lot of questions.

Last year, for example, a lady of eighty-two wanted to book for a mountaineering (登山) holiday in the Alps,

and Brain had great difficulty in persuading her that it would not be suitable. In the end, she decided to go for

a Mediterranean cruise instead. 

     Arranging journeys for people who have to travel abroad on business is often very complicated (复杂), but

Brain enjoys this work. For example, last spring Mr.Perry, a director of a local chemical firm, went on a

business trip, and Brain arranged it all for him. First, Mr.Perry traveled to London by train, and stayed overnight

in a hotel near the airport, because his plane left nearly the next morning. He flew to Frankfurt, in Germany,

where he spent the morning discussing business. Then he went on by train to Zurich, where he stayed the

night. After a meeting the next morning, he caught a plane for Tokyo, and spent three days there before going

to America. He had business in Seattle, Chicago and New York, and stayed some time in each of those places.

From New York, he flew back to London and then went home by train. The next day he telephoned the agency

to thank Brain for arranging everything so well for him.

1. Who would like to work in travel agency? [ ]

A. People who live an industrial city.

B. People who would like to travel but cannot.

C. Ambitions people.

D. The people who go on holidays abroad.

2. When do customers come into the office to book their holidays? [ ]

A. Early in the morning.

B. Every year.

C. In January.

D. Shortly after receiving the booklet.

3. Mr. Perry telephoned the agency to thank Brain because _____. [ ]

A. Mr. Perry arranged everything so well for Brain

B. Brain arranged everything so well for him

C. the agency sent Mr. Perry abroad on business

D. Brain helped him in the travel agency

4. How was Mr. Perry's journey arranged?

    a. Fly to Tokyo              b. To Frankfurt                c. Back home by train

    d. Fly back to London    e. To Zurich by train

    f. Have business in Seattle, Chicago and New York  g. To London by train [ ]

A. g, b, a, f, e, d, c

B. c, b, a, g, e, f, d

C. g, b, e, a, f, d, c

D. f, e, a, b, g, c, d

白某是儿少卫生学的研究生，研究课题是学龄前儿童生长发育变化趋势预测，他的关于儿童身高的预测数据对于下列哪项工作有帮助

A．设计和改良幼儿园坐椅
B．设计汽车驾驶室的高度
C．设计幼儿园的大小
D．设计幼儿园房间的高度
E．幼儿服装的设计