汽车维护周期的确定。
参考答案：
按汽车单位行驶里程维修费用最小的原则确定维护周期。
The spokeswoman said at the news conference that they were considering having the term the
Russian group strongly objected to ______.[ ]
A. changing
B. changed
C. change
D. being changed
熊掌主要产于何地？分哪些品种？其特点是什么？
