问题
选择题
下列等式成立的是（ ）
|
答案
A、由于分式的分子和分母所乘的不是同一个非0的式子，因此分式的值改变，故A错误；
B、分式的分子和分母同时加上一个不为0的式子，分式的值改变，故B错误；
C、同B，分式的分子和分母同时减去一个不为0的式子，分式的值改变，故C错误；
D、根据分数的基本性质可知：
=n m
（a≠0）是正确的，na ma
故选D．
搜题请搜索小程序“爱下问搜题”
下列等式成立的是（ ）
|
A、由于分式的分子和分母所乘的不是同一个非0的式子，因此分式的值改变，故A错误；
B、分式的分子和分母同时加上一个不为0的式子，分式的值改变，故B错误；
C、同B，分式的分子和分母同时减去一个不为0的式子，分式的值改变，故C错误；
D、根据分数的基本性质可知：
=n m
（a≠0）是正确的，na ma
故选D．
用所给词语的恰当形式填空，每词限用一次。
小题2:Mary’s parents would like her ________________ the joy (喜悦) in helping others. 小题3:What he said _________________ me. 小题4:The boy got very bad grades and he was afraid _________________ his father. 小题5:When I walked past his room, I saw him _________________ a big stone over his head. 小题6:_________________ our health is very important for everyone. 小题7:The other day, my classmates and I _________________ the early bus. How lucky! 小题8:_________________ food. Many people are hungry in today’s world. 小题9:I_________________ to him twice since I received his last letter. 小题10:I hope the Japanese _________________ their mistakes as soon as possible. |