影响X线强度分布的因素是 A．靶面倾角 B．辐射时间的长短 C．阳极的类型固定或旋转

文件传输协议的简称是（）。

A．TCP

B．FTP

C．HTP

D．VDP

阅读理解。

     My name is Nicky. I've been a travel writer for twenty years now. It's a really interesting life. I was

only twenty-one when I started traveling. The first country I went to was Mexico. At first, I studied

Spanish for six months in Mexico City. Then I traveled to other parts of Mexico, and all over South

America. My favorite country was Peru. It has everything-great beaches, tall mountains, and forests

with lots of strange and wonderful animals. Brazil is the only South American country I've never visited,

but I'm a great fan of their football team! I hope to watch a football match in Brazil one day.

    What other countries have I been to? Well, I've been to most parts of Asia. I spent three years in

China, and I lived in India for five years. However, I've never been to Japan. My friends tell me it's

really expensive there. I like to spend my time in cheaper countries. At the moment, I'm living in Vietnam.

It's a beautiful country, and the people are very friendly. I've been living here for two years now, and I

love it!

根据短文内容，回答下列问题。

1. Why does Nicky like being a travel writer?

   ____________________________________________________________________________

2. How long did Nicky spend in Mexico City?

   ____________________________________________________________________________

3. Which part of South America has Nicky never been to?

   ____________________________________________________________________________

4. Why has Nicky never been to Japan?

   ____________________________________________________________________________

5. Why does Nicky like to live in Vietnam?

   ____________________________________________________________________________

当事人对药品检验机构的检验结果有异议的，可以自收到检验结果之日起申请复验的期限是（）

A．7天

B．10天

C．5天

D．20天

E．15天

□58÷4的商是三位数，□中最小填______，这时商是______，余数是______．

下列有关肝海绵状血管瘤在超声检查中的描述，错误的是（）

A.直径较小者多呈致密的低回声

B.较大的海绵状血管瘤其回声通常不均匀

C.病灶内及周边彩色血管一般不丰富

D.较大的海绵状血管瘤通常边界不清

E.可呈圆形、椭圆形、分叶状