要使一块质量为30g的橡皮泥漂浮在水面上,你的做法是 _________ ,此橡皮泥漂浮时所受浮力是 _________ N.(g取10N/kg)
把橡皮泥捏成船形或碗形;0.3
若2x+3y=5,则x=______.(用y的代数式表示x)
— Why do you suggest we buy a new machine?
— Because the old one has been damaged ______. [ ]
A. beyond reach
B. beyond repair
C. beyond control
D. beyond description