种实调制
参考答案:
又称为种实处理,即把种子从果实中取出来的工序。目的是获得纯净的、便于运输、贮藏或播种用的优良种子。种实调制的内容有:脱粒、净种、干燥、分级。
. Doctor Wang _____ at seven o’clock for the conference, but she didn’t turn up.
A.should have arrived
B.should arrive
C.should be arrived
D.should be arriving