【简答题】果汁饮料中的有机酸,用NaOH标准溶液滴定时,被中和成盐类,以 为指示剂。
【简答题】4 已知某电容C = 4F,两端电压为uC = 5V,则其存储的电场能量为( )J。
【判断题】果汁饮料中的有机酸,用NaOH标准溶液滴定时,被中和成盐类。以酚酞为指示剂,滴定至溶液呈现淡红色,1min不褪色为终点。
【简答题】________ made me more unhappy was _________ the boy asked my friend to be his girlfriend and she agreed. A.What;that B.That;that C.What;whether D.It;that
【简答题】I’d like to buy a present for my girlfriend’s birthday,_______ at a reasonable price but of great value. A.which B.as C.that D.one
【简答题】My girlfriend ______ a pen pal since she was in her early s. Ahad Bhas had Chave Dhave had
【简答题】4 已知某电容C=4F,两端电压为Uc=5V,则其储存的电场能量为____________J。