TPM产生的有形效果是什么？

患者，女，27岁，低热、乏力2周，咳嗽，痰中带血，CT示右肺下叶一不规则高密度影，边界不清，其中见空洞，周围可见小斑点状卫星灶，血沉50mm/h。

还需做哪项检查以辅助诊断（）

A.抽胸液送检

B.B超

C.CT

D.EKG

E.ESR

对⁶⁰钴的γ射线和加速器的6MV的X射线所使用的低熔点铅厚度一般是（）

A.5cm

B.6cm

C.8cm

D.10cm

E.15cm

You might think that hamburgers were invented in the United States, but that is not totally true. These (1) , or patties, actually came from Germany in the middle of the nineteenth century. They were brought to the United States by (2) who came from the city of Hamburg. That is why (3) was "hamburger steak".

However, people in other places (4) that they invented the hamburger. Perhaps we’ll never have a (5) . But there’s no question that the hamburger was a (6) . Why Perhaps because at that time, industry was growing and a kind of (7) food was needed for workers.

The hamburger became even more popular (8) when the first chain of fast food restaurants was started. This chain was called "White Castle". It served tiny hamburgers that were sold for only (9) . Then, in the 1930s there came the (10) where customers were served in their cars by waiters in uniform. And the hamburger was one of the most (11) .

By now, The hamburger was ready to (12) the world. And this happened with McDonald’s, which was actually a (13) at first. But by the early 1950s the hot dog was replaced by the hamburger. McDonald’s and other fast food restaurants (14) around the world throughout the rest of the twentieth century. McDonald’s alone has (15) for everyone person in the world.

The importance of the hamburger to (16) remains significant. About (17) of all sandwiches that are eaten are hamburgers. According to some sources, (18) of current workers in the United States had their first job at McDonald’s. But the face of the hamburger is changing (19) . Nowadays it is possible to buy a chicken burger, a turkey burger, (20) , or veggie burger.

19（）

数据库是在计算机系统中按照一定的数据模型组织、存储和应用的______。

A．文件的集合

B．数据的集合

C．命令的集合

D．程序的集合