每天都会有新的盐分进入海水,海水中也会有一些盐分进入海床沉积层。新注入的盐分质量与海水里跑掉的盐分数量互相抵消,海水的平均熔盐度保持稳定。这表明 ①量变是质变的必要准备 ②质变是量变的必然结果 ③静止是种特殊的运动 ④物质是运动的物质
—Would you help me _______, Mr Zhang? This question’s too hard for me. —OK. Let me try.
The little boy asked his father whether France is ______ European country.
---Have you found the information about the famous people ____you can use for the report? ---Not yet. I’ll search some on the Internet.
Bob always asks his mother _______ at 6:30 a.m.
The high school entrance examination will be over soon. Can you tell me _____ the summer holiday?