下列各微粒中，核外电子总数相等的是（ ）
A．Na和Na+
B．N2和CO2
C．NH4+和H2O
D．H2S和H2O
答案：C
In relation to the Company Law of China:
(c) state the legal remedy for a shareholder if he and the company fail to reach an agreement for the purchase of equity. (2 marks)
以下不属于孕激素的是
A．左炔诺孕酮B．醋酸甲地孕酮C．米非司酮D．黄体酮E．醋酸甲羟孕酮
