A:②③
B:①④
C:②④
D:①③
(Ⅰ)当a=﹣1时,求函数y=f(x)的值域;
(Ⅱ)若函数y=f(x)在定义域上是减函数,求a的取值范围;
(Ⅲ)求函数y=f(x)在x∈(0,1上的最大值及最小值,并求出函数取最值时x的值.
621 + 121 = 2- 14 = 89 - 23 = 27 + 47 + 17 =
910 + 110 = 35 + 13 = 716 + 332 = 2425 - 1325 - 625 =
根据句意及首字母提示完成单词
(1)I was b____ in a small town.
(2) —What’s your teacher like? —She is s____ with us.
(3)The students are all from the same p____ school.
(4)We should be____(友好的)to our friends.
(5)There are three hotels in this____(城镇).
2014年10月,教育部下发《关于深入开展节粮节水节电活动的通知》实施一周年,许多同学养成节约的意识和习惯,说明教育部这一举措( )