A:what; trained
B:who; transferred
C:what; transformed
D:who; transformed
She ____ ____ ____ a poor family.
质点作直线运动的v﹣t图象如图所示,则下列说法正确的是( )
下列关于亚洲经济发展的说法正确的是
人们食用加碘食盐以及常吃海带、紫菜等,可以有效地防治( )