发热以夜间为甚，其病机是（）。 A.阳明腑实 B.气虚血虚 C.温病入营 D.湿温内

When I was a child, I once went on camping with my family in summer. We decided to make a barbecue in a valley where lay in a beautiful mountain. So we collected some tree sticks to make the fire. My father ask me if I could try to make a fire. I was happier to take the job. Then I tried to set fire to the wood with a match, and produced only smoke. Then my father said, “That’s the right way. I’ll show you how to do it. First use the small piece of wood because they catch fire easy. Then put the larger ones on the top of them.” My father helped him make a big fire.

世界上第一条地铁在1863年建于( )。

A．纽约
B．巴黎
C．阿姆斯特丹
D．伦敦

当线芯导体截面过大时，（）和（）对其电阻的影响很严重。

与医学有关，属于有瓣类的常见蝇类有科、（）蝇科、蝇科和（）蝇科（）