单项选择题

下列属于重量分选装置的为
A、机械称式设备
B、光电式分选机
C、滚筒式设备
D、颜色分选机

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未分类题

'These countries' in Line , ParA.3, most probably refers to ______.A.the developing countries which used to be coloniesB.the former British colonies which now are developingC.the colonized countries which become as strong as BritainD.the developing countries which are still colonized by Britain

A.A.the
B.the
C.the
D.the

未分类题

Which of the following statements is TRUE of 'my father' ?A.My father was an optimist.B.My father didn't like to take any preventive measures.C.My father often visited doctors.D.My father was wise enough to mind his own health.

A.My
B.
B.My
C.
C.My
D.
D.My

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