下列何药不是四君子汤的药组（） A.人参 B.干姜 C.白术 D.茯苓 E.甘草

Part 2

·Your are the sales manager of ACL Company. Your customer, Jackson Bryer, invites you to have dinner with him on Tuesday the Twelfth at seven o ’clock. Write a letter to Mr. Bryer:
☆ Telling him that you cannot have dinner with him.
☆ Saying that you have another engagement that day.
☆ Suggesting two different times when you are free.
Write 30-40 words.

已知函数f（x）=ax³+（a-1）x²+48（a-2）x+b的图象关于原点成中心对称，试判断f（x）在区间[-4，4]上的单调性，并证明你的结论．

哪种情况下，FGD可申请锅炉紧急停炉？

属于基本输入输出设备的是（）。

A.键盘

B.扫描仪

C.鼠标器

D.显示器

次生菌丝（二生菌丝）