There are _____ months in a year. September is the _____ month.
A:twelfth; ninth
B:twelve; nine
C:twelve; nineth
D:twelve; ninth
【内容提示】
⑴半夜,被一阵巨响吵醒;
⑵Gus想尽快离开,Liz决定先看看发生了什么事;
⑶Liz和Gus发现自己坐在一个外星人的背上;
⑷Liz和Gus跑回母舰。
Liz and Gus reached an unknown planet in their mother ship and decided to have a sleep on it.
甲、乙两车绕周长为400千米的环形跑道行驶,它们从同一地点同时出发,背向而行,5小时相遇,如果两车每小时各加快10千米,那么相遇点距离前一次相遇地点3千米,已知乙车比甲车快,求原来每小时行多少千米?