目前在我国实行计划生育还存在哪些困难?
参考答案:
存在的困难有:
(1)生产力水平较低;
(2)地区发展不平衡;
(3)社会保障制度不健全;
(4)传统生育观念的影响还将长期存在。
如图所示,图甲、图乙是两种声音的波形,从图可知:图甲是______的波形;图乙是______的波形.
请用所给单词连词成句。
1. took, My, in, pictures, father, park, yesterday, the (.)
____________________________________________________________________
2. did, What, holiday, Peter, last, do (?)
3. weekend, going, are, next, Where, they (?)
4. usually, Sundays, mountains, I, on, climb (.)