籽棉含水过低,在加工过程中易()
A、产生带纤维籽屑
B、形成索丝和棉结
C、增加短纤维率
D、产生破籽
参考答案:C, D, P
It was not until mid-night _____ he went back home after the experiment.
A.when
B./
C.that
D.before
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