Luckily, the people there did ______ help him.

A．that they could

B．which they could to

C．what they could

D．what they could to

关于二氧化钛输送管线堵塞处理措施不正确的是（）。

A、首先切换到备用泵，观察流量是否正常

B、若是公用管线堵塞用新鲜EG清洗

C、若流量计堵塞用新鲜EG冲洗

D、若处理不通，则从TiO2泵出口到添加剂喷嘴接皮带满足TiO2供应，不用作相应处理