在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，词首字母已给。

     Tina is an a 1__ girl. She has a very good h__2   She exercises more than

one hour every day. So she h__3 ever catches a cold. She lives in a place

where there are lakes Kaishandao, so she has to go to school by b__4__ every day. She thinks it's more interesting than taking a bus! She has many friends

and she and her friends like going h  5  on holidays. And last summer holiday, she and her friends went to Tibet for vacation. There are f  6__ students in her class--twenty-six girls and fourteen boys! She loves her class very much!

1.a______  2.h______ 3.h______  4.b______  5.h______  6.f________

下列哪种甲状腺肿瘤电镜下细胞内可见神经内分泌颗粒：（）

A．甲状腺滤泡性腺瘤

B．甲状腺 * * 状癌

C．甲状腺未分化癌

D．甲状腺髓样癌