神经调节的基本方式是（）
A.反射
B.非条件反射
C.条件反射
D.正反馈
E.负反馈
参考答案：A
— The doctor told me____ too much but I find it difficult.
— The doctor is right. The less you drink, ______ you will be.
A．don't drink; the healthier
B．not to drink; the healthier
C．not to drink; the more healthier
D．don't drink; healthier
随着钢中含碳量和合金元素的增加，闪光焊接头（）有明显提高。
A.硬度
B.塑性
C.韧性
