霍乱弧菌分几个生物型？

The man as well  as his horse ____ crossed the river ____ from Tokyo.     [ ]

A. which, come                  

B. that, comes    

C. who, came                    

D. who,come

Mary is _________ primary school student in Beijing.

A．a 8-year-old

B．an 8-year-old

C．a 8-years-old

D．an 8-years-old

铠装热电偶是把（）、（）和金属套管三者加工在一起的坚实缆状组合体。

咨询员在帮咨询对象作出决定时应

A．教育
B．动员
C．强迫
D．代为选择
E．帮助选择

临床上治疗血行失常，常以调气为上，调血次之。其理论依据是

A．气能生血
B．气能行血
C．气能摄血
D．血能生气