决定太阳电池的性能参数有很多，几个重要参数包括（）A、开路电压 B、短路电流 C、最大输

根据上下文及首字母提示完成短文。（每空一词）

      Tianjin is 1. a___________ open city. It is the third largest city in 2. C___________. Tianjin is not far from

Beijing. It is 120 km 3. f___________ Tianjin to Beijing. There are 10, 000, 000 4. p___________ in the city.

Tianjin is the industrial and commercial center in 5. N__________ China. Now, there are many 6. b__________

in the city. Along the Haihe 7. R___________ lies a big park. It's 8. c___________ the Haihe Park. There are

many trees and 9. f___________ everywhere. Tianjin is really a 10. b___________ city.

六腑的生理特点是

A．化生精气

B．贮藏精气

C．满而不实

D．藏而不泻

E．以上都不是

—David, how old is your father this year?

—______. And we just had a special party for his _____ birthday last weekend.

A．Fortieth; forty

B．Forty; forty

C．Forty; fortieth

D．Fortieth; fortieth

根据氨基酸组成判断营养价值最高的蛋白质（）

A.甘、蛋、丙、丝、丝、丙

B.甘、蛋、丙、丝、色、丝

C.甘、蛋、丙、丝、丙、丙

D.甘、蛋、丙、丝、甘、丙

E.甘、蛋、丙、丝、色、赖

请回答下列与体温恒定及调节有关的问题：

当人处于炎热的环境中时，通过中枢的调节，使（）舒张，以增加（），也使（）增多，从而使（）增加。