单项选择题 选择题：（  ）节流调速回路可承受负负载。A. 进油路B. 回油路C. 旁油路

问答题 Fill in the blanks with the expressions below, change the form where necessary. target; refresh one’s memory; measure; make a point of doing something; accompany; last but not least; point out; at hand; pay off; principal 14. Being a teacher of two large classes, David always _______ spending as much as he can with them.

单项选择题 By applying the philosophies and principles of Sun Tzu,                can peacefully be overcome.  A、confront  B、conflict C、confess D、concentration