—What is the of the sign on the bottle?—It “Keep away from the children”.
A:means; meaning
B:meaningful; meaning
C:meaning; means
D:means; mean
解方程或解比例。
①6x-18=36
②x- 34 x=2
③ 1.20.5 = 3x
发光二极管俗称LED,如图所示,把LED接入电路,闭合开关后LED正常发光,用手触摸几乎不发热.以下说法正确的是( )
What's this? It's .