—Sure. Eric is also ____ it and we become friends because of that.
A：proud of
B：afraid of
C：interested in
D：serious about
可以发生逆转录现象的是下列哪种生物 ( )
有一个弹簧测力计，弹簧及其构件完好无损，某同学用其测量一物体的重力时，错将物体挂在了拉环上，当物体静止时，弹簧测力计的示数为10.0N，则物体的重力（ ）
