题目内容 (请给出正确答案)
[主观题]

Directions: This part is to test your reading ability. There are 5 tasks for you to fulfil

l. You should read the reading materials carefully and do the tasks as you are instructed.

Task 1

Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 to 40. For each question or statement there are 4 choices marked A), B), C) and D). You should make the correct choice and mark the corresponding letter on the Answer Sheet with a single line through the center.

An ebook(also referred to as an electronic book,eBook,or e-book)is a digital version(版本)of a print book that you download and read. But if you want to read an ebook, you must have an Ebook Reader, which is a kind of free software used by your computer. Make sure you have installed the appropriate Reader before you download your ebook from the Internet. The software allows you to turn the words on the screen into the size you like. It also helps you turn pages and change your viewing options(计算机屏幕上的阅读选择). Ebooks are a fun alternative to regular books. You can download them to any computers and create your own library of hundreds of titles. If you load them onto your portable computer,you can take them with you when you travel. Some ebooks are even interactive! Best of all,when you order an ebook,there is no waiting and no shipping charges. The amount of time it takes to download your ebook depends on the speed of your connection and the size of your ebook.

36. From this passage,we learn that an ebook___________.

A) can be found in any library

B) can be read directly from the Internet

C) can be read by any one who has a computer

D) can be read when special software is installed

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第1题

某地15人接种某疫苗后,测得其抗体滴度从1:20到1:320不等,为求其平均滴度,最好选用A.众数B.算术均

某地15人接种某疫苗后,测得其抗体滴度从1:20到1:320不等,为求其平均滴度,最好选用

A.众数

B.算术均数

C.几何均数

D.中位数

E.百分位数

点击查看答案

第2题

某些儿童接种某疫苗后抗体滴度为1:20、1:40、1:80、1:160、1:320。为求平均抗体滴度,最好选用()

A.中位数

B.几何均数

C.算数均数

D.标准差

点击查看答案

第3题

5人接种某疫苗后抗体滴度为1:20、1:40、1:80、1:160、1:320。为求平均抗体滴度,最好选用()

A.中位数

B.几何均数

C.均数

D.加权均数

点击查看答案

第4题

某地5人接种某疫苗后抗体滴定度为1:20、1:40、1:80、1:160 、1:320。为求平均滴定度,最好选用()

A.中位数

B. 几何均数

C. 算术平均数

D. 众数

点击查看答案

第5题

某科室5人接种流感疫苗一个月后测定抗体滴度为1:40、1:80、1:80、1:160、1:320,求平均滴度应选用的指标是()

A.均数

B.倒数的均数

C.几何均数

D.中位数

点击查看答案
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