Are you ready _____________ basketball?[ ]
A. to learn
B. for learn
答案：A
将12mol/L的盐酸（ρ=1.19g/cm3）50mL稀释成6mol/L的盐酸(ρ=1.10g/cm3)，需加水的体积为( )
A．50mL
B．50.5mL
C．55mL
D．59.5mL
种子贮藏忌讳什么？
