三个袋中各装有个球，其中第一个袋和第二个袋中各有一个红球和一个黄球，第三个袋中有

阅读理解。

      There was once a man called Mr. Flowers, and flowers were his only

joy in life. He spent all his free time in one of his four glass-houses and

grew flowers of every color, with long and difficult names, for

competitions (比赛). He tried to grow a rose of a new color to win the

silver cup (银杯) for the Rose of the Year.

Mr. Flowers' glass-houses were very near to a middle school. Boys of

around thirteen of age were often tempted (引诱) to throw a stone or two

at one of Mr. Flowers' glass-houses. So Mr. Flowers did his best to be in

or near his glass-houses at the beginning and end of the school day.

     But it was not always possible to be on watch at those times. Mr.

Flowers had tried in many ways to protect his glass, but nothing that he

had done had been useful. He had been to school to report to the

headmaster; but this had not done any good. He had tried to drive away

the boys that threw stones into his garden; but the boys could run faster

than he could, and they laughed at him from far away. Hehad even picked

up all the stones that he could find around his garden, so that the boys

would have nothing to throw; but they soon found others.

     At last Mr. Flowers had a good idea. He put up a large notice (布告)

made of good, strong wood, some meters away from the glass-houses. On

it he had written the words: DO NOT THROW STONES AT THIS

NOTICE. After this, Mr. Flowers had no further trouble; the boys were

much more tempted to throw stones at the notice than at the glass-houses.

1.It was Mr. Flowers' hope to ________.

A.build glass-houses in his free time

B.grow the Rose of the Year in a silver cup

C.win a silver cup for growing a rose of a new color

D.grow a rose with the longest name

2.Boys were often tempted to ________.

A.throw stones at Mr. Flowers' glass-house

B.throw stones at Mr. Flowers from their school

C.be in or near by Mr. Flowers' glass-houses

D.play with Mr. Flowers near his glass-houses

3.Mr. Flowers stayed in or near by his glass-houses _______.

A.at times when school-boys were walking near them

B.all the school day when there were no boys about

C.where he could not be seen by the boys passing

D.in his free time at the beginning and end of the school day

4.Mr. Flowers had tried to ______ to protect his glass.

A. be on watch in his free time

B. ask the headmaster for help

C. pick up all the stones around his garden

D. do all the above

5.Mr. Flowers' good idea was to ______.

A.write some words on the glass

B.put up a large notice to cover his glass-houses

C.give the boys something else to throw stones at

D.send for policemen

2009年《自然》杂志报道了我国科学家通过测量SiO₂中²⁶Al和¹⁰Be两种元素的比例确定“北京人”年龄的研究结果，这种测量方法叫“铝铍测年法”。 请完成下列填空：

（1）¹⁰Be和⁹Be           。（填序号）

a．具有相同的化学性质    b．Be 元素的近似相对原子质量是9.5

c．具有相同的中子数      d．通过化学变化可以实现¹⁰Be和⁹Be间的相互转化

（2）研究表明²⁶Al可以衰变为²⁶Mg，可以比较这两种元素金属性强弱的方法是   。（填序号）

a．比较这两种元素的单质的硬度和熔点 

b．将空气中放置已久的这两种元素的单质分别和热水作用

c．将打磨过的镁带和铝片分别和热水作用，并滴入酚酞溶液

d．在氯化铝和氯化镁的溶液中分别滴加过量的氢氧化钠溶液

（3）目前还有一种测量方法叫“钾氩测年法”。写出和Ar核外电子排布相同的阴离子的半径由大到小的顺序          (用化学符号表示)；其中一种离子与钾相邻元素的离子所形成的化合物可用做干操剂，此化合物的电子式为          。

在实际应用中，通常用正态分布来描述（）的分布。

A.每日股票价格

B.每日股票指数

C.股票价格每日变动值

D.股票价格每日收益率

《中华人民共和国循环经济促进法》是由第十一届全国人民代表大会常务委员会第（）次会议通过

A、一

B、二

C、三

D、四

3岁男孩，蛋、鱼、肉、青菜、水果等均喜欢吃；每天喜欢饮冷鲜牛奶，常于食牛奶后诉脐周痛。近3个月面色差，易发热、咳嗽，大便1～2次／日，稍稀。体检：面色苍白，心尖部Ⅰ级收缩期杂音，双肺未见异常，腹平软，肝、脾未触及。Hb80g／L，RBC3．5×10¹²／L，MCV67fl，网织红细胞0．015。大便潜血试验（+）。

该患儿给予硫酸亚铁每天4mg／kg治疗1个月后，贫血稍有改善但仍不正常，可能原因是（）

A.诊断错误

B.硫酸亚铁吸收不良

C.病因未去除

D.药物剂量不够

E.硫酸亚铁剂型不好