根据环境污染的来源我们可以把环境污染归纳为二个因素A．生物因素、化学因素 B．物理因 发布时间：2017-12-20 17:59 │ 来源：www.tikuol.com 题型：单项选择题 问题： 根据环境污染的来源我们可以把环境污染归纳为二个因素A．生物因素、化学因素B．物理因素、化学因素C．人为的因素和自然的因素D．直接因素和间接因素E．工业“三废”和生活因素
题型：单项选择题 完形填空。 France is the world's number one tourist destination. It is a country with a lot of 1 areas, offering holidays 2 almost everyone. You can go shopping in Paris or you can go 3 in the Alps. You can also relax on the beach at theweekend or you can go to the 4 of the Loire Valley on a bike. You can do many different kinds of interesting things. In fact, many 5 of the country attracts milllions of visitors to go back, year after year. Paris is possibly 6 city in the world, but other less well-known regions are also well worth visitingin France, 7 , Franche-Comté and Gascony or Berry-the small quiet villages in the green heart of France. France is also 8 for its food, from fresh baked bread for breakfast to a five-course dinner in a restaurant. A trip to France is also a trip for different 9 . Sit back, relax and open a bottle of 10 -you'll come back for more after you first visit to France. ( )1.A. agricultural ( )2.A. to ( )3.A. skating ( )4.A. fields ( )5.A. attractions ( )6.A. the most beautiful ( )7.A. for example ( )8.A. similar ( )9.A. smells ( )10.A. mineral water B. cultural B. for B. swimming B. castles B. more beautiful B. exhibitions B. such as B. familiar B. smell B. Coke C. scenic C. with C. surfing C. schools C. landmarks C. beautiful C. as C. popular C. tastes C. beer D. business D. of D. skiing D. towers D. less beautiful D. concerts D. like D. famous D. taste D. wine 查看答案
题型：单项选择题 He carefully but he could not his teacher clearly. [ ]A. heard; listen B. listen; hear C. listened; hear D. heard; listened 查看答案
题型：单项选择题 可逆反应PCl5(g)=PCl3(g)+C12(g)在密闭容器中进行，其焓变小于零，当达到平衡时，下列说法正确的是（）。A．平衡条件不变，加人催化剂使平衡向右移B．保持体积不变，加人氮气使压力增加一倍，平衡向左移C．增加温度，增大反应物的浓度平衡向左移D．降低温度，增大反应物的浓度，平衡向右移 查看答案