机体内最重要的调节方式是（）
A.神经调节
B.体液调节
C.自身调节
D.反馈调节
E.负反馈调节
参考答案：A
A new educational CD-ROM _____ by Nancy has just come out.[ ]
A. was designed
B. designed
C. designing
D. was designing
化工厂送来盐酸一车，测其比重1.16g/cm3，取1ml稀释至1000ml，取其中100ml于锥形瓶中，用C（NaOH）=0.1mol/L标准溶液滴至甲基橙终点消耗9.50ml，求盐酸浓度？（Cl分子量为35.5）
