某电子元件厂拟建构件表面处理工程，年处理电子元件144万件。厂房高12m，废气处理设施的排气筒均设置在厂房外侧。年工作日300d，每天8h。 生产过程产生的硫酸雾浓度为200mg/m3，经处理后外排，排气筒高度20m，排气量30000m3/h，排气浓度45mg/m3。喷涂和烘干产生的二甲苯有机废气经吸收过滤后外排，二甲苯产生量5g/件(产品)，净化效率为80%，经15m高排气筒排放，排气量9375m3/h。 生产过程产生的废水有化学镀镍废水，涂装车间含六价铬、镍废水，电镀车间含六价铬、镍和磷酸盐废水。 生产过程中产生的废漆渣拟送该厂现在锅炉焚烧，废切削液由厂家回收，含铬镍废液送水泥厂焚烧，生活垃圾集中送市政垃圾填埋场处置。 (注：二甲苯排气筒高度15m，《大气污染物综合排放标准》规定最高允许排放速率为1.0kg/h，最高允许排放浓度为70mg/m3。) 为避免或减缓喷涂产生的废气，除设备本身工艺技术外，还应考虑采取哪些措施

A. they are not encouraged to be engaged in science
B. industry does not require PhD holders
C. they won’t earn much money after graduation
D. they will face the cost and financial sacrifice

A. The economic benefit.
B. The long roads between the cities in the western part of the country.
C. The currently used turbocharged engine.
D. The current German and Australian policies.

A. Only four types of policies still exist today.
B. They cost less than the ones in the Middle Ages.
C. They include features similar to earlier policies.
D. The interest rates are based on early methods of calculation.