电脑：鼠标 A．水壶：茶杯 B．手机：短信 C．船：锚 D．录音机：磁带

同学们养过蚕吗？蚕宝宝吐出的丝线能织成各式丝绸服装。人类拥有这种珍贵的丝绸至少已有4000年了。请你养几条蚕，探究它的取食行为。（4分）

（1）提出问题：蚕总是吃桑叶，而不吃其他植物的叶子，这是先天性行为吗？

（2）作出假设：蚕总是吃桑叶，而不吃其他植物的叶子，这是先天性行为。

（3）制定计划：

①实验用的蚕要选择（   ）。  [ A．个体大的  B．个体小的        C．刚由卵孵出的 ]

②实验的对照组是（   ）。   [ A．桑叶           B．其他植物的叶子            C．蚕 ]

③对于每一组蚕的数量，你认为该选择（   ）。   [ A．一只        B．十只 ]

（4）实施计划：（略）

（5）得出结论：如果你的实验结果与你的假设相吻合。那么你的结论是             。

下列药物中，不具有抗炎作用的是( )。

A．扑热息痛

B．安乃近

C．水杨酸钠

D．保泰松

E．替泊沙林

Sarah Williams went to a boarding school.  Here is one of the

letters she wrote to her parents from the school.

Wentworth Girls' School

Beachside

July 20th

Dearest Mom and Dad,

I'm afraid I have some very bad news for you. I have been very naughty and the school principal is very angry with me. She is going to write to you. You must come and take me away from here. She does not want me in the school any longer.

The trouble started last night when I was smoking in bed.  This is against the rules, of course. We are not supposed to smoke at all.

As I was smoking, I heard footsteps coming towards the room. I did not want a teacher to catch me smoking, so I threw the cigarette away.

Unfortunately, the cigarette fell into the waste-paper basket, which caught fire.

There was a curtain near the waste-paper basket which caught fire, too. Soon the whole room was burning.

The principal phoned for the fire department. The school is a long way from the town and by the time the fire department arrived, the whole school was in flames. Many of the girls are in the hospital.

The principal says that the fire was all my fault and you must pay for the damage. She will send you a bill for about a million dollars.

I’m very sorry about this.

Much love,

Sarah

P. S. None of the above is true, but I have failed my exams. I just want you to know how bad things could have been!

小题1:Why did Sarah write home?

A．To tell her parents about the fire.

B．To ask for a lot of money.

C．To tell her parents she had failed her exams.

D．To tell her parents she had to leave school.小题2:Why did Sarah tell her parents the story about the fire?

A．She wanted to worry them.

B．She wanted to make them laugh.

C．She wanted to make them less angry at the real news.

D．She wanted to warn them about what the principal was going to do.小题3:The letter before the. P. S. was        .

A．mostly true

B．partly true

C．completely true

D．completely untrue

捣固装置内侧夹持缸体的结构形状有（）。

A、双耳环型式

B、单耳环型式

C、单耳环和双耳环

D、三耳环型式

某城市污水处理厂日产生含水率为97%的浓缩污泥1000吨，这些浓缩污泥全部采用机械脱水到含水85%（假设此脱水过程污泥干物质不发生变化），这是污泥采用高温堆肥技术作堆肥处理，由于此脱水污泥水分含量仍太高不适合堆肥，堆肥厂需要用含水是为15%的破碎后秸杆调节水分，混合后堆肥材料的目标水分含量为65%，若每天产生的这些脱水污泥全部用来堆肥，问每天至少需要多少重量的秸杆来调节水分（）

A.48吨

B.60吨

C.80吨

D.82.4吨