局部振动对神经系统的影响（）。
A.皮肤感觉迟钝
B.振动觉增强
C.反应潜伏期缩短
D.大脑皮质功能增强
E.交叉神经功能抑制
参考答案：A
——Your friend Alice looks down today. What is up?
——Well, ________ happened to her was her own fault!
A．wherever
B．However
C．whatever
D．No matter what
不属于第二信使的是（）
A.cAMP
B.cGMP
C.激素
D.三磷酸肌醇
E.甘油二酯
