丁烯-1/乙烯低时调节（）。
A.增加丁烯-1进料量
B.增加乙烯进料量
C.增加氢气进料量
D.增加预聚物注入量
参考答案：A
王夫之别号（）
A.一壶道人
B.白石道人
C.亭林先生
D.梨洲先生
(2013·江西重点中学一次联考)________ was known to them that the boss had broken his promise ________ he would give them a rise.
A．What; what
B．It; which
C．It; that
D．As; that
