印度高科技比较发达的原因是:①重视科技人才培养、②国家经济实力雄厚、③积极引进外资和先进技术、④工业基础雄厚 [ ]
A、①③
B、②③
C、③④
D、①②
答案:A
根据下面情景,选择恰当的选项。
1. 当别人问你来自哪里后,应回答说:[ ]
A. You're welcome.
B. I'm from America.
C. My name is Li Mei.
2. 当你很惊讶地看到一只大鹅时,应说:[ ]
A. What a big goose!
B. How beautiful!
C. What a big fish!
3. 当你把物品给别人时,应说:[ ]
A. It's here.
B. Here you are.
C. Here it is.
4. 当你正在找玩具汽车时,应说: [ ]
A. Where is my taxi?
B. Where is my car?
C. This is my car.
5. 当看到别人要摔跤时,应说:[ ]
A. Watch TV.
B. Watch out.
C. Look at me.
何谓状态?何谓平衡状态?何为稳定状态?