肥达试验检测的对象是 （） A.抗原 B.抗体 C.补体 D.细胞因子 E.黏附分

School education is very important and 小题1:u      . Yet no one can learn 小题2:       at school and a teacher cannot teach his students everything they want to know. His work is to show his students 小题3:_      to learn. He teaches them to read and think alone. So much more is to be learned outside school by the students 小题4:     (他们自己). It is always more important to know how to study by oneself. It is quite easy 小题5:     learn something, but it is difficult to use it to solve 小题6:p      . Great inventors don’t get everything at school, but they still can make many things and 小题7:    (改变) the world a lot. How can the inventors do all of this? One of answer is : They know how to study. A lot of things are not 小题8:t      in the classroom. They get a lot of 小题9:       （知识）by reading outside school. They work 小题10:h    and never give up all their lives.

应急电源可供使用的功率应能充分供应（）的用电。

A．船上所有为主机服务的重要负载

B．生活所需的所有次要负载

C．为安全所需的所有重要设备

D．船上所有照明负载

图中画出了氢原子的4个能级，并注明了相应的能量．现有一群氢原子处在第二能级．

（1）要用光照射使这些氢原子激发到第四能级，求照射光的光子能量为多少eV．

（2）在图中画出处在n=4的能级的氢原子各种跃迁示意图．

（3）上述跃迁中发出的波长最长的光的光子能量为多少eV．

简述汽车采暖系统的类型。

强度