At present , the butter factory is still polluting the river though it _____to stop.

A．ordered

B．has ordered

C．will be ordered

D．has been ordered

不符合长石砂岩的定义的是（）？

A.石英含量大于50%

B.颗粒中长石含量大于25%

C.岩屑的含量小于长石的含量

D.石英含量小于75%