帮帮小弟阿!
题目
帮帮小弟阿!
为班级制定一些规章制度,50个字以上 用must和mustn'写 如果好的话有追加分
mustn't must 用这两个写 要50字以上
答案
1.Everyone must pick up their rubbish and put it in the rubbishbin when leaving the class.You mustn't leave any rubbish behind.
2.Cellphones must be turned off during class.
3.Uniforms must be correctly worn.
4.Eveyone must be silent while the teacher is talking.The teacher should not have to talk over the students.
5.Everyone must do what the teacher says,must not disorbey the teacher.
6.Mustn't fight each other,must be friendly to each other.
7.Must do your homeworks.
8.Everyone must obey these rules!
不知到有没有50字.想到的只有这些.我想这些应该有50吧.
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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