搜题请搜索小程序“爱下问搜题”
问题
填空题
计算：
3x
x-4y
+
x+y
4y-x
-
7y
x-4y
=______．
答案
原式=
3x-x-y-7y
x-4y
=
2(x-4y)
x-4y
=2．
故答案为：2．
单项选择题
液上喷射泡沫灭火系统产生器设置数量储罐直径小于10m时，应设置产生器（）个。
A、1
B、2
C、3
D、4
查看答案
补全对话，情景问答
给下列的问句选择对应的答语。
( ) 1. Who is this?
( ) 2. What do you like?
( ) 3. Can you dance?
( ) 4. What are these?
( ) 5. What shape is it?
( ) 6. What's this?
A. These are my shoes.
B. Yes, I can.
C. It is a tiger.
D. I like juice.
E. This is my father.
F. It's a rectangle.
查看答案
