选择题:After so many years, he still ____ the hope that h

题目内容:
After so many years, he still ____ the hope that his lost son would return one day.
(A) clang to
(B) clung to
(C) inclined to
(D) subjected to
参考答案:

某车间有5股流量固定的物料同时进入一个保温良好的密闭容器中,容器底部有一台泵将混合物料输送到其它车间

某车间有5股流量固定的物料同时进入一个保温良好的密闭容器中,容器底部有一台泵将混合物料输送到其它车间。如果要维持容器内液面稳定,该泵有哪些参数可自由调节?()A

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