题目

科学实验要规范操作,下列实验你认为操作正确的是（） A . 测定某溶液的pH B . 干燥氧气 C . 试管中放入锌粒 D . 稀释浓硫酸 答案：BGood afternoon, and welcome to England. We hope that your visit here will be a pleasant one. Today, I would like to draw your attention to a few of our laws. The first one is about drinking. Now, you may not buy alcohol in this country if you are under 18 years of age, nor may your friends buy it for you . Secondly, noise. Enjoy yourselves by all means, but please don't make unnecessary noise, particularly at night. We ask you to respect other people who may wish to be quiet. Thirdly, crossing the road. Be careful. The traffic moves on the left side of the road in this country. Use pedestrian crossings and do not take any changes when crossing the road. My next point is about litter. It is an offence to drop litter in the street. When you have something to throw away, please put in your pocket and take it home, or put in a litter bin. Finally, as regards smoking, it is against the law to buy cigarettes or tobacco if you are under 16 years of age. I'd like to finish by saying that if you require any sort of help or assistance, you should contact your local police station, who will be pleased to help you . Now, are there any questions?【小题1】The main purpose of this speech would be to ________.A．inform people of the punishment for breaking lawsB．declare the laws of different kinds.C．give advice to travelers to the countryD．prepare people for international travel【小题2】How many laws are there discussed in the speech?A．ThreeB．FourC．SixD．Five【小题3】The underlined word "contact" in the seventh paragraph means ________.A．get in touch with B．keep in touch with C．joinD．report【小题4】Who do you think is most likely to make the speech?A．A lawyerB．A policemanC．A teacherD．A lawmaker