(判断题)21: 如果火花塞绝缘体裙部的温度低于自洁温度,就会引起火花塞积炭,若温度过高,则产生早燃、爆燃现象。
A: 错误
B: 正确
1.(单选题)若集合A={a,{a},{1,2}},则下列表述正确的是(). A.{a,{a}}A B.{1,2}...
1.(单选题)—Howoftendoyougodancing — A.I will go dancing tomorrow. B.Yesterday....
1.(单选题)—Howlongisthiscellphoneguaranteed —______ A.No problem. B.You can re...
1.(单选题)—Wouldyouliketogotoattendtheconferenceonglobalwarmingwithme —______,...
1.(单选题)—Whatisthetrainingabout —_______ A.It is about the latest flood-proo...