---Could you tell me the_______of making such tasty cakes?
---Well,I just follow the instructions in the cookbook.
如1图所示,温度计示数是 ____.小明用刻度尺测物体的长度,如图2所示,他所用的刻度尺的分度值是 ____,物体的长度是 ____
下列实验操作中错误的是( )
央视公益广告:“知羞方能止休”,倡导文明出行,反对车窗抛物。其实质是号召大家( )