A.低轉(zhuǎn)速的時(shí)候較長(zhǎng)較粗的進(jìn)氣道有利于提高充氣效率
B.低轉(zhuǎn)速的時(shí)候較長(zhǎng)較細(xì)的進(jìn)氣道有利于提高充氣效率
C.高轉(zhuǎn)速的時(shí)候較長(zhǎng)較粗的進(jìn)氣道有利于提高充氣效率
D.低轉(zhuǎn)速的時(shí)候較長(zhǎng)較細(xì)的進(jìn)氣道有利于提高充氣效率

A.提高水的冰點(diǎn)
B.提高水的沸點(diǎn)
C.對(duì)水泵潤(rùn)滑
D.防止發(fā)動(dòng)機(jī)銹蝕