(单选题)9: 蓄电池使用的电解液其密度是()
A: 越大越好
B: 越小越好
C: 密度没有要求,而纯度有要求
D: 在保证不结冰的前提下,密度适当偏小
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...