题目内容
气门的打开，靠(）。
查看答案
搜索结果不匹配？点我反馈
更多问题
顶置式气门是由凸轮轴上的凸轮压动摇臂顶开的，其关闭是依靠气门弹簧实现的。
气门传动组的主要功用使进、排气门能按配气相位规定的时刻开闭，且保证有足够的开度。
The interviewer asked Michael Jordan some questions about his career.The interviewer ________________________________ about his career.
After I picked up my old friend at the airport, we had lunch together.After I picked up my old friend at the airport, we _______________.
微信支付 
支付宝支付