制作或保藏的猪后腿及其肉块

胃毒剂药剂经由害虫的口器，通过消化系统进入体内，引起害虫中毒死亡。( )

某校化学兴趣小组为了探究原电池工作原理，进行如下系列实验：

结果：

(1)实验一中铜片、锌片表面均有红色物质析出，电流计指针偏转，但较短时间内电流即明显减小。实验结束 时测得锌片减少了3. 94g，铜片增重了3.84g，则该原电池的工作效率是___（指参加原电池反应的锌 占反应总量的百分率）。

(2)实验二中刚将铜、锌片插入溶液中时电流计指针有偏转，但立即就归零了。为什么锌的电子不能持续通过导线流向铜电极给Cu²⁺?___。

(3)实验三中盐桥中K⁺流向____溶液（填“ZnSO₄”或“CuSO₄”），如果Zn的消耗速率为1×10 ^-3 mol/s，则 K⁺的迁移速率为___mol/s。与实验一比较，实验三原电池的工作效率大大提高，原因是____ 。

(4)实验四中电流计指针仍有偏转，写出铜电极的电极反应式：___。

下面是我国两大重要的商品性农业生产基地。读图，回答下列问题。(20分)

(1)将甲、乙两区域平原地区优势农产品名称填在表中。(4分)

区域	粮食作物	经济作物
甲
乙

(2)说明近年来甲图中A、B区域湖泊面临的主要环境问题及解决措施。(4分)

(3)从自然角度考虑，图中C、D平原农业发展的主要制约因素及解决措施是什么？(4分)

(4)与乙区域相比，甲区域农业的发展，有哪些明显的区位优势？(4分)

(5)到2012年底，我国粮食生产已经“九连增”，你认为下列符合粮食增产方式的途径有      （多项选择题）（4分）

A. 大幅度扩大耕地面积    

B. 调动农民种粮的积极性

C. 退耕还林、退耕还牧、退湖还田

D. 加大农业科技投入，提高劳动生产率

E. 大范围改造湿地，排干沼泽，变湿地为耕地

F. 培育良种，发展面向市场的产品

G. 发展粮食产品的深加工，提高产品的附加值

My husband and children think they are very lucky that they are living and that it’s Christmas again. They can’t see that we live on a dirty street in a dirty house among people who aren’t much good. But Johnny and children can’t see this. What a pity it is that our neighbours have to make happiness out of all this dirt. I decided that my children must get out of this. The money that we’ve saved isn’t nearly enough.

The McGaritys have money but they are so proud. They look down upon the poor. The McGarity girl just yesterday stood out there in the street eating from a bag of candy(糖果)while a ring of hungry children watched her. I saw those children looking at her and crying in their hearts; and when she couldn’t eat any more she threw the rest down the sewer(下水道). Why, is it only because they have money ? There is more to happiness than money in the world, isn’t there?

Miss Jackson who teaches at the Settlement House isn’t rich, but she knows things. She understands people. Her eyes look straight into yours when she talks with you. She can read your mind. I’d like to see the children be like Miss Jackson when they grow up.

小题1:This passage mainly suggests that the writer _______.

A．is easy to get along with　　　　　　

B．is unhappy with the life they are living

C．is good at observing and understanding　　

D．is never pleased with her neigbours小题2:What do you think of McGarity girl?

A．She is proud and hungry.

B．She is selfish and cruel.

C．She is lonely and friendless.

D．She is unhappy and misunderstood.小题3: In this text, the writer tries to tell us that _______.

A．money is the key to everything　　

B．the more money you have, the less happy you’ll be

C．there is something more important than money

D．when talking to people we should look into their eyes小题4: Pick out the one that does NOT describe the writer’s view on money.

A．Why, is it only because they have money?

B．There is more to happiness than money.

C．Miss Jackson isn’t rich, but she knows things.

D．The money we saved isn’t nearly enough.

较大的任意皮瓣长宽比值一般不宜超过（）

A.1：1

B.1.5：l

C.2：1

D.2.5：1

E.3：1