问题
连词成句
将所给单词连成完整、正确的句子，(单词不得重复使用，标点已给出)。
1. a, pal, pen, have, in, I, Canada.
_____________________________________.
2. can, he, some, English, speak,.
______________________________________.
3.he, English, often, me, helps, my, with
______________________________________.
4. my, in, father, office, works, an
______________________________________.
5. you, would, have, like, dinner, to, me, with?
_________________________________________________?
答案
1. I have a pen pal in Canada.
2. He can speak some English.
3. He often helps me with my English.
4. My father works in an office.
5. Would you like to have dinner with me?
)，滑块与水平地面间的动摩擦因数为μ，试求当滑块静止时，可处于什么样的位置？