“桔生淮南则为桔，桔生淮北则为枳。”同一物品，在不同的环境中往往具有不同的属性，这是因为（）

①人为事物的联系可以改变事物的本质属性

②客观事物的属性受周围条件的影响和制约

③事物的性质因为其可变性而具有不确定性

④事物的属性在不同联系中呈现不同的特点

    Hi, I'm Tom. I'm a student. I'm eleven. My birthday is on 12th July. I go to school by bike. My father is a fireman. He uses water to put out fires. He's brave. He goes to work by bus. My mother is a doctor. She works in a hospital. She helps people. She goes to work by car. I like helping people, too. I want to be a doctor in the future. But my brother wants to fly a plane. He wants to be a pilot in the future.

埃及大部分地区气候干旱，光热丰富，在水源充足的尼罗河沿岸盛产（  ）

Mother：Sally, can you help me, please? I want to go shopping.

Sally : OK. Mum. What do you want to buy?

Mum : Some eggs, some oranges, some milk, and some chicken for supper. What can we have for lunch tomorrow?

Sally : I don't know.

Mother : Oh ,yes, it is. Some fish.

Sally : Is fish very expensive ( 昂贵的）?

Mother: Yes , it is. But dad likes fish.

Sally : What about some rice?

Mother : I want some nice bread.

Sally : OK. Let' s go.