我国儿童的错畸形发生率达（）
A.40％
B.25％
C.28.4％
D.91.2％
E.82％
参考答案：A
The boy was ______ frightened ______ move.[ ]
A. such, that
B. enough, to
C. so, that
D. too, to
反应速度常数与稳定性有何关系？
