简述萨维尼的法律发展三阶段理论。
参考答案:[*]C:\Documents and Settings\Administrator\My Documents\图片\9.jpg
参照反应Br+H2HBr+H的能量对应反应历程的示意图,下列叙述中正确的是
A、吸热反应一定要加热后才能发生
B、升高温度可增大正反应速率,降低逆反应速率
C、正反应为吸热反应
D、反应物总能量高于生成物总能量
—Do you know all your classmates _____ now?
—Yes. I like them _____. [ ]
A. very much; very much
B. very well; very much
C. very well; very well
D. very much; very well