最佳点火提前角可以大大提高发动机的动力性、燃油经济性和排放性。
参考答案：对
Neither side is prepared to talk to _____ unless we can smooth things over between them. [ ]
A. others
B. the other
C. another
D. one other
大叶性肺炎的可能并发症（）
A.肺肉质变
B.肺脓肿
C.脓胸
D.肺褐色硬变
E.败血症
