能够减少乙烯装置管式裂解炉露点腐蚀的措施有()。
A.降低排烟温度
B.提高排烟温度
C.增加过剩空气
D.减少过剩空气
参考答案:B, D
Tom ______ a pen friend but he doesn't ______ a radio.[ ]
A. have, have
B. has, has
C. have, has
D. has, have
中国证监会在受理金融期货结算业务资格申请之日起()个月内,做出批准或者不批准的决定。
A.1
B.2
C.3
D.5