下列腧穴中孕妇应该禁针的是（）。
A.曲池
B.肩井
C.肩贞
D.大椎
E.足三里
参考答案：B
Lai Changxing _____ Canada with his family before the policemen began to catch him. [ ]
A. had been to
B. has gone to
C. would go to
D. had arrived in
消化液中最重要的是（）。
A.唾液
B.胃液
C.胆汁
D.胰液
E.小肠液
