夸夸自己，体验自尊。请你写出自己身上的五个优点，并说说你的感受。

（1）

优点一：                                                                                                            

优点二：                                                                                                            

优点三：                                                                                                            

优点四：                                                                                                            

优点五：                                                                                                            

（2）我的感受是：                                                                                  

最不适用于成人颅脑超声检查的探头频率是

A.2.0MHz

B.2.5MHz

C.3.5MHz

D.4.0MHz

E.5.0MHz