质量为m的物体受到两个互成角度的恒力F₁和F₂的作用，若物体由静止开始，则它将做______运动，若物体运动一段时间后撤去一个外力F₁，物体继续做的运动是______运动．

任务型阅读，根据短文内容完成下列句子。

Dear Zhang Fan,

      I want to go to China very much. I think I know something about China from your letters, but I know

little about Chinese food. I like hamburgers and Coke very much. I like noodles and French fries, too. My

friends tell me that you eat rice, vegetables and meat every day. Is that right? I don't like rice. What food

and drink can I have in China? Please write to me. 　 　

                                                                                                                                       Yours, 　　　　　　

                                                                                                                                        Robert

1.______ writes this letter.

2. He writes this letter to ______.

3. Robert ______ from China.

4. Robert likes ______ and ______ very much.

5. If he comes to China, he will not eat ______.