裂解汽油加氢装置BTX（脱碳九）塔的作用是（）。
A、脱除二甲苯
B、分离苯、甲苯、二甲苯
C、脱除碳九以上馏分
D、脱除苯
参考答案：C
. ---I wonder if I can get a rise in salary.
---You have been paid enough. __________ do you want?
A．How much
B．What more
C．What else
D．How much more
发展观光农业对生态环境保护与建设的意义
