问题
选择题
下列物质的制取中，不能直接用乙烯做原料的是
A．聚乙烯
B．聚氯乙烯
C．二溴乙烷
D．乙烷
答案
答案：B
搜题请搜索小程序“爱下问搜题”
下列物质的制取中，不能直接用乙烯做原料的是
A．聚乙烯
B．聚氯乙烯
C．二溴乙烷
D．乙烷
答案：B
| 阅读理解 | |||||||||||||
1. _______ can get a Special Admission ticket for himself/ herself. A. A 56-year-old bus driver B. A school girl with her valid student card C. A policeman in his forties D. A U.S. army officer on active duty 2. If you want to enter the Expo Park once every week in one month and don't want to bother to buy the ticket each time, you can buy a ______ ticket. A. Single Day Admission B. Special Admission C. 3 Day Admission D. 7 Day Admission 3. The function of the table is to ______ . A. remind the public of the difficulty buying the Expo tickets B. show which groups of people can get admission into the Expo Park C. provide information about the Expo tickets and regulations D. introduce all the visiting regulations in the Expo Park |