十二指肠纵襞位于十二指肠____________部__________壁。
参考答案:降、后内侧
—I will buy you a new bike if you learn how to swim this summer.
—Is that a ________? I’m sure I’ll get the bike.
A.chance
B.promise
C.trick
D.treat
—What are you?
—__________.[ ]
A. I'm very well.
B. I'm eleven
C. I'm in Mr. Li's office
D. I'm a basketball player