科学采购包括（）。
A.订货点采购和MRP采购
B.准时化采购
C.供应链采购和电子商务采购
D.以上选项都包括
参考答案：D
根据句意，用适当的词填空。
1.There are ________ days in a week.
2.My favorite ________ is hamburgers.
3.________ is the third day of the week.
4.I don’t like science ________ it is too difficult.
5.Maria likes to ________ a little longer on Sunday morning.
6.Mary likes art ________ she doesn’t like music.
(81～83题共用备选答案)
小儿重度贫血( )
A．Hb 140～120g/LB．Hb 120～90g/LC．Hb 90～60g/LD．Hb 60～30g/LE．Hb＜30g/L
