广州陆地面积占全省陆地面积的比例是多少？（）A、3.21% B、4.21% C、4.

阅读理解

     Sam likes eating fish very much. He often buys fish in the shop and takes them home. Oneday his wife

sees the fish and thinks,  "Good! Now, I can ask my friends to have lunch and we can eat the fish. They

like fish very much."

     When Sam comes home from work in the everning, the fish is not there and his wife says,"Oh, your cat

eats it." And then she gives him some bread for his supper. Sam is angry. He takes the cat and his wife to

a shop near his house and weighs(称) the cat. Then he turns to his wife and says,"My fish weighs one kilo.

The cat weighs one kilo, too. My cat is here,you see, then, where is my fish?"

1. What does Sam like eating very much?

    ____________________________________________

2. Who eat the fish that day?

    ____________________________________________

3. How much does the fish weigh?

    ____________________________________________

4. What does Sam's wife give him for supper?

    ____________________________________________

5. Can you guess if(是否) Sam knows where the fish is?

    ____________________________________________

解题说明：　　本大题要求判断所给出的条件能否充分支持题干中陈述的结论。阅读条件（1）和（2）后选择：A、条件（1）充分，但条件（2）不充分B、条件（2）充分，但条件（1）不充分C、条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分D、条件（1）充分，条件（2）也充分E、条件（1）和（2）单独都不充分，条件（1）和条件（2）联合起来也不充分

三角形ABC的面积保持不变 （1）底边AB增加了2厘米，AB上的高h减少了2厘米 （2）底边AB扩大了1倍，AB上的高h减少了50%

实验室可用水磨石或防静电地板，不推荐使用地毯，因为（）。

A.不利于清洁

B.地毯易积聚灰尘，还会产生静电

C.价格太贵

D.摩擦系数太大

绝经前后诸证的产生机制主要是（）

A.肝血不足，冲任亏虚

B.脾气虚弱，冲任失养

C.肾气虚衰，天癸渐竭

D.心肾不交，冲任失调

E.心脾两虚，冲任俱虚

肝性脑病抽搐时，最好选用的药物是：（）

A．地西泮

B．哌替啶

C．吗啡

D．氯丙嗪