外科营养中的TPN是指（）
A.肠外营养
B.肠内营养
C.完全胃肠外营养
D.营养均衡
E.复合性营养
参考答案：C
About thirty metres away, a boat pulled alongside the slippery steps leading to the sea. [ ]
A. through
B. across
C. down
D. up
液力偶合器具有过载保护和改善电动机的启动性能的功能。
