—It's great. If we follow it, we can finish the task in a short time.
A:question
B:introduction
C:suggestion
若f′(3)=4,则limh→0f3-h-f32h为( )
They can't buy anything because _________ of the shops are open now
下列处理用电事故的措施中,符合安全用电原则的是( )
摩托罗拉公司研发了一种由甲醇为原料的新型手机电池,其容量为锂电池的10倍,可连续使用一个月才充一次电,其电池反应原理为:2CH3OH + 3O2 + 4NaOH = 2X + 6H2O,其中X的化学式为( )