题目

—We               to have you here tonight.    —Thank you and it is               for me to be invited. A. honour; honourable                   B. honour; an honour C. are honoured; honourable                 D. are honoured; an honour   答案：D下面是某同学的部分观察结论，与事实相符的是A．血液由血浆和红细胞组成B．小鱼尾鳍毛细血管内的红细胞单行通过C．心房与动脉相连，心室与静脉相连D．动脉内有动脉瓣、静脉内有静脉瓣、心脏内有房室瓣