当归韧皮部宽广，可见分泌组织
A．油细胞 B．油室 C．油管 D．油室和油管 E．树脂道
参考答案：D
You ________ your son to watch TV for too long hours! See, Mr. Morrison called that he didn’t finish his homework yesterday.
A．are always permitting
B．have permitted
C．permit
D．permitted
供应链结点企业产需率越大，则说明( )。
A．供应链半成品库存量越小
B．供应链半成品库存量越大
C．供应链成品库存量越小
D．供应链成品库存量越大
