笔记本每本a元，买3本笔记本共支出y元，在这个问题中：①a是

更新 2022-09-03
科目数学
题型选择题
难度中等
浏览 1734

挑错有奖

笔记本每本a元，买3本笔记本共支出y元，在这个问题中：
①a是常量时，y是变量；
②a是变量时，y是常量；
③a是变量时，y也是变量；
④a，y可以都是常量或都是变量；
上述判断正确的有（）

A．1个

B．2个

C．3个

D．4个

登录免费查看答案和解析

相关试题

They were plying soccer on the playground the storm came．（　　）

A．

as soon as

B．

as long as

C．

when

D．

while

题型：未知
难度：未知

收藏答案/解析

I can't find my wallet anywhere．I'm sure I it．（　　）

A．

lost

B．

will lose

C．

lose

D．

have lost

题型：未知
难度：未知

收藏答案/解析

He felt surprised that he couldn't say a word with is mouth wide open．（　　）

A．

very

B．

such

C．

D．

too

题型：未知
难度：未知

收藏答案/解析

Look，the lady in red be our English teacher．

No，she be．She is in the office now．（　　）

A．	must； can't	B．	can； mustn't
C．	may； mustn't	D．	shall； can't

题型：未知
难度：未知

收藏答案/解析

I didn't hear ．So I asked him to repeat it．（　　）

A．	what did he say at the meeting
B．	what he said at the meeting
C．	where would he spend his holiday
D．	where he has spent his holiday

题型：未知
难度：未知

收藏答案/解析

推荐套卷

热门套卷