在腹部损伤中，十二指肠损伤好发于（）
A.球部和升部
B.降部和升部
C.球部和降部
D.横部和升部
E.降部和横部
参考答案：E
20. When Jane began to take swimming lessons, her main__________was the fear of water.
A．evidence
B．crisis
C．obstacle
D．Danger
Bob: How long have you lived here? Sue: _________.
A．Since the beginning of the year.
B．In 1990
C．Not long ago
D．Only until the end of the year
