问题 单项选择题

双光束型与双波长型分光光度计的区别在于()

A.光源

B.样品池

C.单色器

D.检测器

答案

参考答案:C

写句子

根据图画,连线并写一句话。

          乌鸦喝水                                                                                            

                                                                                                                                              

           司马光                                                                                                

                                                                                                                                              

           四个太阳                                                                                               

                                                                                                                                               

              称象                                                                                                      

                                                                                                                                                

单项选择题