—In ten minutes.
A:how often I can borrow the magazine
B:how long I can keep the magazine
C:how soon I can get on the train
D:how far is it from our school to Furonghu Park
①____ A.foot B.food
②____ A.zoo B.cool
③____ A.school B.look
④____ A.room B.blue
⑤____ A.cook B.good
⑥____ A.afternoon B.goodbye
Be careful when you come _______ the street, because the traffic is very busy at the moment.
小明和小方分别向氢氧化钠溶液中滴加稀硫酸做中和反应时忘记使用指示剂,为了探究硫酸与氢氧化钠是否恰好完全反应.
已知:菱形ABCD中,对角线AC与BD相交于点O,OE∥DC交BC于点E,AD=6cm,则OE的长为( )