在劳动密集型配送中心,分拣作业人员占大约()。
A.10%
B.20%
C.30%
D.50%
参考答案:D
Toni Morrison, Nobel Prize-winning American writer, says if there’s a book you really want to read, but it ______ yet, then you must write it.
A.hasn’t been written
B.hasn’t written
C.doesn’t write
D.isn’t written
万用表的交流250V量程可测量()交流电压。
A.660V
B.360V
C.220V
D.380V