(2015•四川达州)—Excuse me, could you please tell me the way to the ? I have had too much water.—Go along the street and you will find one.
A:bedroom
B:living room
C:classroom
D:restroom
待测物质
试剂
预期显色结果
反应条件
蛋白质
双缩脲试剂
③
④
脂肪
②
红色
常温
①
斐林试剂
砖红色
50~65°C
惯性在日常生活和生产中有利有弊,下面四种现象有弊的是( )