A:两粒石子间的距离将保持不变,速度之差保持不变
B:两粒石子间的距离将不断增大,速度之差保持不变
C:两粒石子间的距离将不断增大,速度之差也越来越大
D:两粒石子间的距离将不断减小,速度之差也越来越小
苏格拉底开创了希腊哲学的新方向,“新”的含义是( )
下列与“唐代中外文化交流”这个主题不相符的是( )
完成句子。1. It's not just because they ____(不能理解它是什么意思).2. F 2 F ____ (表示面对面).3. Homophone often use letters and numbers that ____(听起来像单词或单词的一部分).4. I don't think twelve-year-olds should be allowed to ____ (穿耳洞).5. I think teenagers should be allowed to____(与朋友们外出).6. If we can't wear our own clothes, we should be allowed to____ (设计自己的校服).7. I get nervous before big parties and then I ____(出皮疹).8. It isn't good to borrow your friends' books ____ (未经允许). 9. My life ____(有了很大的改变)in the last few years.