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一、选择题 1．某物理量的大小等于另一个物理量的变化率或与其变化率成正比,下列的四组物理量中满足这一关系的是( ) (A)感应电动势与磁通量． (B)弹力与弹簧的长度． (C)加速度与速度． (D)功与动能． 2．下列有关原子及原子核的说法中正确的是( )
First, multiple choice questions 1. The size of a physical quantity is equal to or proportional to the rate of change of another physical quantity. The following four sets of physical quantities satisfy this relationship: () (A) Induced electromotive force and magnetic flux. (B) The length of spring and spring. (C) Acceleration and speed. (D) Work and kinetic energy. 2. The following is true in the following statement about atoms and nuclei: