it's difficult for
it's good to keep
don't need twenty times
is old enough to
It's necessary not to allow children to eat
it's difficult for
it's good to keep
don't need twenty times
is old enough to
It's necessary not to allow children to eat
最新问答: 生殖细胞只能进行减数分裂? It's not easy for me to play soccer改为同义句.It's ___ ____ ____ 若方程5x-2a=8的解是非负数,则a的取值范围是什么? NA个微粒就是6.02*10的23次方个微粒 这句话对吗? The only funny things we heard that evening came from the ad small的比较级是什么 176乘47的竖式怎么列 全世界每年因生锈损失的钢铁占世界年产量的__% 粲然一笑四个字怎么读 no加单数还是复数,还是两者有区别 (2011•丰台区一模)如图所示,O是正方体ABCD-A1B1C1D1对角线A1C与AC1的交点,E为棱BB1的中点,则 为什么油滴在水里都是圆形的? 一个三角形一边长是5一边长是7求另一边中线的范围是多少 陌生人用英语怎么说 伟大的反义词都有哪些? a/are/chairs/few/there//have/a/please/seat连词成句 某有机化合物仅由碳、氢、氧三种元素组成,其相对分子质量小于150,若已知其中氧的质量分数为50%,则分子中碳原子的个数最 so you should not ask what am l ding .do you now? 世界上各月降水量都很多的地区是( ) 直角梯形的高AB=20厘米,∠1=∠2=45°,梯形ABCD的面积是多少平方厘米?