题目

a、b、c、d分别是一些生物细胞某个分裂时期的示意图，下列有关描述正确的是 A．a图表示植物细胞有丝分裂中期 B．b图表示人红细胞分裂的某个阶段 C．c图细胞分裂后将产生1个次级卵母细胞和1个极体 D．d图细胞中含有8条染色单体 答案：DTravelling to all corners of the world gets easier and easier. We live in a global village, but this doesn't mean that we all behave in the same way.How should we behave when we meet someone for the first time? An American shakes your hand firmly while looking you straight in the eye. In Thailand, people greet each other by pressing both hands together at the chest.Many countries have rules about what you should and shouldn't wear. In Muslim countries, women should wear long blouses and skirts.In Korea, you should take off your shoes when entering a house. Remember to place them neatly together where you came in.In Spain, many people eat a light breakfast and a late dinner. In Mexico, lunch is the time to relax, and many people prefer not to discuss business as they eat. In Britain,? it's not unusual to have a business meeting over breakfast.Good MannersAspect?Country?Custom??America?Shaking hands firmly?Greeting?Thailand?1．【1】??Muslim countries?2．【2】?Dressing?Korea?Taking off your shoes at the door??Spain?3．【3】?Eating?Mexico?Relaxing while having lunch?Britain?4．【4】???