紫外线杀菌的最佳波长为()A.200nm B.260nm C.560nm D.300

题型:单项选择题

问题:

紫外线杀菌的最佳波长为()

A.200nm

B.260nm

C.560nm

D.300nm

E.650nm

考点:西药执业药师药学综合知识与技能西药执业药师药学综合知识与技能38
题型:单项选择题

阅读理解

     My friend, Emma Daniels, spent the summer of 1974 traveling in Israel. During her month-long stay in

Jerusalem she often went to a caf? called Chocolate Soup. It was run by two men, one of whom - Alex -

used to live in Montreal. One morning when Emma went in for coffee, while chatting with her new friend

Alex, she mentioned that she had just finished the book she was reading and had nothing else to read. Alex said he had a wonderful book she might like, and that he'd be happy to lend it to her. As he lived just

above the caf?, he quickly ran up to get it. The book he handed to Emma just minutes later was Markings, a book by a former Secretary-General of the United Nations (UN).

     Emma had never read it, nor had she ever bought a copy. But, when she opened it up, she was floored to see her own name and address inside the cover in her own handwriting. It turned out that the summer

before, at a concert back in Montreal, Emma had met a Californian who was in town visiting friends. They decided to exchange (交换) addresses, but neither of them had any paper. The man opened up a book he was carrying in his backpack and asked Emma to write her name and address inside. When he returned to California, he left the book behind in Montreal, and his friend Alex kept it. When Alex later moved to

Jerusalem, he took the book along.

1. Alex lent Emma the book, Markings, ________.

A. to show his interest in reading

B. to show his friendliness to her

C. to tell her about the importance of the UN

D. to let her write her name and address inside

2. How did Emma feel the moment she opened the book?

A. Pleased                  

B. Satisfied

C. Worried                 

D. Surprised

3. We can learn from the text that the Californian ________.

A. met Emma at a concert

B. invited Emma to a concert

C. introduced Emma to his friend

D. left Emma his backpack

4. Who was supposed to be the first owner of the book?

A. An official of the UN

B. Alex's friend from California

C. A friend of the author's

D. A coffee shop owner

题型:单项选择题

请按照英语书写的要求将下列短文抄写到四线格上。注意大小写和标点符号。

good morning,everyone. my name is betty. I am thirteen. I am american. Now I live in china. I am a student. lingling is my good friend.

题型:单项选择题

抹耐热砂浆,采用水泥要求用大于______级的矾土水泥或矿渣水泥。

A.22.5

B.32.5

C.42.5

D.62.5

题型:单项选择题

Word2003的“查找和替换”功能十分强大,下面选项属于其中的是()

A.能够查找文本和替换文本中的格式

B.能够查找文本和替换文本中的字符

C.能够查找图形对象

D.能够用通配符进行复杂搜索

题型:单项选择题

调整安装的配电柜时,应使其垂直误差不大于柜高的()。

A.1/1000

B.1.5/1000

C.2/1000

D.2.5/1000

更多题库