搜题请搜索小程序“爱下问搜题”
问题
填空题
若lga+lgb=0(其中a≠1,b≠1),则函数f(x)=a
x
与g(x)=b
x
的图象关于( )对称.
答案
y轴
选择题
函数f(x)=
-
x
2
+3x+4
的单调递减区间为( )
A.(-∞,
3
2
]
B.[-1,
3
2
]
C.[
3
2
,+∞)
D.[
3
2
,4]
查看答案
补全对话,情景问答
根据A栏的问题,选择B栏的答语,将其标号填入题前括号内。
A
( ) 1. Could you take a message?
( ) 2. Who's that?
( ) 3. When and where shall we meet?
( ) 4. Which is your mother?
( ) 5. Can I help you?
B
a. Yes, I want a T-shirt.
b. At 8:00 at the school gate.
c. With pleasure.
d. This is Mary speaking.
e. The woman in red.
查看答案