停工时在（）条件下可以大量外甩油浆。
A.切断进料
B.沉降器内没有催化剂
C.塔顶温度小于100度
参考答案：A
With a lot of difficult problems ____, the newly -elected president is having a hard time.
A．settled
B．settling
C．to settle
D．being settled
卵生
