二极管加反向电压时，它所呈现的电阻很小。

短文改错（共10小题，每小题1分，满分10分） 

I have read the advertisement in the today’s newspaper. I am             1. ___________          

quite delighting at the news that the International Traveling Festival     2. ___________         

will be start soon by our city government. With a good number of            3. ___________         

foreign guests coming, it is a great need for volunteers. My name is     4. ___________         

Li Hua. Being an 18-year-old boy, I am now studying in a senior                 5. ___________         

school. And I’d like be a volunteer for the Traveling Festival. I like      6. ___________         

English very much. I like making friend and being ready to help.                7. ___________         

I believe it is very suitable with me to take such a job. I can work            8. ___________         

as a interpreter for the festival. From the bottom of my heart, I hope          9. ___________         

that our Traveling Festival will be a great successful. Thanks.              10. ___________         

计算机存储容量的单位包括

A．HB

B．TB

C．KB

D．MB

E．GB

代谢性酸中毒失代偿期可出现（）

A．血浆pH和，PCO₂↑

B．血浆PCO₂，和，pH↑

C．血浆pH、PCO₂、均↓

D．血浆pH和PCO₂↑，

E．血浆pH、PCO₂、和均↑

为避免发霉、变色、虫蛀及有效成分的分解和破坏，药材储藏前一般均需（）

A.切片 

B.蒸、煮、烫 

C.熏硫 

D.发汗 

E.干燥

关于醛固酮瘤，下列说法不正确的是（）

A.多为双侧腺瘤

B.直径大多介于1～2cm，胞膜完整，切面呈金黄色，由大量透明细胞组成

C.在电镜下，瘤细胞线粒体嵴呈小板状，显示小球带细胞的特征

D.患者血浆醛固酮浓度与血浆ACTH的昼夜节律呈平行，而对血浆肾素的变化无明显反应

E.少数为肾素反应性腺瘤