若x>0,y>0,且1x+4y=1,则x+y的最小值是( ) A.3 B.6 C.9D 发布时间:2017-05-09 07:14 │ 来源:www.tikuol.com 题型:选择题 问题: 若x>0,y>0,且1x+4y=1,则x+y的最小值是( )A.3B.6C.9D.12
题型:选择题 ________ children whose parents had died in the earthquake ________ sent to other families[ ]A.A great number of; was B.A large number of; wereC.The great number of; was D.The great number of; were 查看答案
题型:选择题 除另有规定外,普通药材酊剂的浓度为()A.每100g相当于原药材200~500gB.每100ml中含被溶物85gC.每100ml相当于原药材100gD.每100ml相当于原药材20gE.每100ml相当于原药材10g(必要时根据其半成品中相关成分的含量加以调整) 查看答案