研究含铁多相混合物行之有效的方法是什么?其有何特点?

题型:问答题 简答题

问题:

研究含铁多相混合物行之有效的方法是什么?其有何特点?

考点:地球科学结晶学与矿物学结晶学与矿物学题库
题型:问答题 简答题

阅读下面阅读材料,然后从各小题所给的四个选项中选择一个最佳答案。

Henry: I find the Internet is very good for shopping. I use more and more for buying books and CDs, and I even bought some clothes over the Internet. The other thing I can do is to book(预订) travels over the Internet. I booked a cheap flight once. It was very easy, and it was really good.

David: I use the Internet for games. I play chess with people all around the world. Last night I had a game with someone from Japan. I also download (下载)games from the Internet, so I can have any game I want.

Peter: I use the Internet for anything I need to help me with my schoolwork. I use the online dictionaries, encyclopedias(百科全书) and magazines. It’s great because I can download pictures or articles and use them to help my homework. It’s very easy to use and it’s free, so I like it.

Tony: Well, the main thing I use the Internet for is to e-mail. I usually write to my customers(顾客) by e-mail, and my customers answer me by e-mail, too. We probably send and receive four or five hundred e-mails a month. But of course, I also use e-mails to keep in touch(保持联系) with friends and family. My daughter is in Australia and we send e-mails to each other every day.

小题1:________ prefers to use the Internet to buy things.

A.Henry

B.David

C.Peter

D.Tony小题2: David’s hobby is to  __________   on the Internet.

A.read books

B.book flights

C.play games

D.download pictures小题3:Peter can use the Internet to ____________easily.

A.play chess

B.do schoolwork

C.do some shopping

D.talk with his daughter小题4:From the passage we know that        .

A.Peter is a teacher

B.Tony is a businessman

C.David is an engineer

D.Henry is a bookseller小题5:Which of the following is NOT true?

A.Henry had an experience of using the Internet to book a cheap flight.

B.David had a game with a Japanese over the Internet one night.

C.Tony often e-mails to his customers, friends and family.

D.Peter needs to pay for what he gets from the Internet.

题型:问答题 简答题

若直线l1:ax+y+2a=0与l2:x+ay+3=0互相平行,则实数a=     .

题型:问答题 简答题

男,28岁,左大腿根部疼痛,肿胀2月余,可触及一质地较硬的肿块,结合影像学检查,最可能的诊断是()

A.骨肉瘤 

B.软骨肉瘤 

C.软骨瘤 

D.骨瘤 

E.骨结核

题型:问答题 简答题

同步设备的告警分为()。

A.事件报告

B.主要告警

C.严重告警

D.次要告警

E.紧急告警

题型:问答题 简答题

慢性支气管炎的体征可出现()

A.哮鸣音 

B.水泡音 

C.两者都有 

D.两者都无

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