反应软黏土原状结构强度的指标是______。 A．灵敏度 B．内摩擦角 C．内聚

某一层吊车的两跨厂房，每跨厂房各设有3台A5工作级别的吊车。试问，通常情况下，进行该两跨厂房的每个排架计算时，参与组合的多台吊车的水平荷载标准值的折减系数应取下列何项数值（）。

A.0.95

B.0.9

C.0.85

D.0.8

水是生命之源，万物之基，是人类最宝贵的自然资源。我国规定水质必须在感官性指标、化学指标、病理学指标等方面达标方可以成为生活饮用水。

（1）感官性指标的主要要求为：①不得呈现异色；②不得有异嗅异味；③不得含有肉眼可见物；④水应澄清透明。净化水时，前两个指标可以利用             的吸附作用（填物质名称）而达到；后两个指标可以通过加入混凝剂反应、沉降，然后通过             （填操作名称）而达到。

（2）化学指标中含有液体的pH和硬度两项。

①测定溶液pH的方法是：                           。

②日常生活中如何区分硬水与软水？请简述实验步骤与现象：                            。

（3）病理学指标中对铬、铅等重金属离子的含量有严格的限制。这是因为：                             。

采用锚喷混凝土加固基坑施工时应优先选用()，以便能较快地凝结。

A.矿渣水泥

B.大坝水泥

C.普通硅酸盐水泥

D.粉煤灰水泥

I had once helped a friend of mine run a watermelon stall. I noticed something interesting. Almost every buyer would lift the melon up to their ear，smartly tap it, apparently trying to listen to something. I wondered what they expected to hear.

Finally I could no longer hold back my curiosity and made bold to ask a customer—an elderly gentleman—about this. Hearing my question，he roared with laughter. Then he replied in a self­mocking(自嘲)tone.“Young lady，I have been doing this for more than fifty years. All I know is that everybody would stare at you as if you were a fool if you just pick up the melon and leave！”

Not long after that，my watermelon stall friend unexpectedly sent me an invitation for her wedding，which really surprised me. I asked her, “How come you are seized by a sudden desire to get married? I don't remember ever hearing you mention that yon've got a boyfriend.” She answered while counting money，“Everyone has to get married anyway，so it is better to get married sooner than later.”

I could think of no word to refute(反驳)her. It seems that everybody is living for everybody else and has forgotten the need of their own heart. It may be safe and save a lot of worries by following others' suit in doing things. The use of We or Us will give one a steady and sure sense of pride. But using the pronoun “I” would often give one a guilty conscience.

I find all these things somewhat funny. We have got used to taking cue from(模仿) others and follow their suit. In turn，we also take it for granted that we should judge the right and wrong of others by our own standard. As a matter of fact，this massive practice is still wrong though we all follow others' suit like this, but we feel at ease and, justified simply because this is the way of us, and so we can have an easy conscience because this has been practiced by so many people.

小题1:The writer probably feels that it is ________.

A．necessary for the buyer to tap the watermelon

B．foolish of the buyers to buy watermelon without tapping it

C．funny that the buyers will tap the watermelons when buying them

D．wise of the elderly gentleman to tap watermelons before buy them小题2:The writer uses the example of her friend's decision of getting married to show that ________.

A．her friend took no account of others's feeling

B．her friend decided to marry just to follow the crowd

C．her friend was a person who has strong personality

D．everybody in the world should marry for others小题3:Which of the following is NOT mentioned in the passage?

A．It may be safe to follow others' suit in doing things.

B．I was surprised to receive my friend's invitation for her wedding.

C．My experience of helping my friend run a watermelon stall was interesting.

D．The use of We or I will give speakers themselves quite different senses.小题4:Which word can replace the underlined word“justified”in the last paragraph?

A．Reasonable.

B．Embarrassed.

C．Ashamed.

D．Nervous.小题5:In which section of a magazine can you read the passage?

A．Art and Life

B．Sport and Health

C．Culture and Society

D．Science and Technology

遗传算法将问题的求解表示成“染色体”，“染色体”实际上是（）

A、基因

B、适应度函数

C、种群

D、用编码表示的字符串