植物甾醇和昆虫变态激素的C17侧链为() A.羟甲基衍生物 B.不饱和内酯环 C.含

题型:单项选择题 B型题

问题:

植物甾醇和昆虫变态激素的C17侧链为()

A.羟甲基衍生物

B.不饱和内酯环

C.含氧螺杂环

D.脂肪烃

E.戊酸

考点:主管药师天然药化天然药化题库
题型:单项选择题 B型题

青霉素G过敏的患者,G+菌感染时可选用的药物是().

A.万古霉素 

B.克拉霉素 

C.红霉素 

D.克林霉素 

E.阿齐霉素

题型:单项选择题 B型题

For hundreds of years, artists have used cartoons to criticize bad rulers or landowners. As early as the 19th century, people produced and read books of drawings. In many ways, they were similar to modern comics(漫画). They contained stories of naughty children and playful animals. The owl and the elephant were usually wise animals, ready to give advice. The lion and tiger were brave. The fox and wolf were cunning, greedy and dangerous.

A century ago, an American newspaper published the first-color comic strip. It was so popular that sales of the newspaper, Morning Journal, increased quickly. Since then, newspapers throughout the world have included comic strips.

In modern time, comics are popular in China, Japan, the USA and almost everywhere. Not even video games or CD-ROMs have reduced their popularity. Names such as Snoopy, Woodstock and Garfield are well known in dozens of countries. The Peanuts comic strip appears in over 2,000 newspapers and in more than 25 languages.

Perhaps one day, you may like to create your own comic strip and become a millionaire. First, you must think of a good plot. It should be funny, exciting or interesting in some way. It should have plenty of action. Moreover, the language must be realistic and simple. The words should suit the characters in your story.

Furthermore, the characters in your story must be clear to readers. They should be obviously good or bad. In many comic strips—especially those showing crime of adventure—there should also be a hero or heroine. This will attract the reader to keep on reading the story. 

1. Which of the following is NOT the name of a cartoon character?

A. Snoopy             B. Garfield         C. Peanuts        D. Woodstock

2. We can know from the first paraphaph that rulers ________.

A. asked the artists to draw cartoons          B. probably did not like cartoons about them.

C. often drew cartoons many years ago.       D. used cartoons to give people advice.

3. According to the passage, what makes a popular and successful comic strip?

A. Good plot        B. suitable language      C. clear characters     D. All of above

4. The underlined word “plot” is similar in meaning to ______.

A. places             B. stories           C. events               D. characters

题型:单项选择题 B型题

氟的防龋机制不包括

A.釉质溶解性增加

B.抑制烯醇酶

C.促进再矿化

D.抑制细菌产酸

E.影响牙外形

题型:单项选择题 B型题

在2011年1月版海马《常用配件价目表》里,丘比特前玻璃升降器为()元/件

A.126

B.189

C.246

D.365

题型:单项选择题 B型题

全民健身计划是以全国人民为实施对象,以青少年和儿童为重点。

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