浮选法中使矿物颗粒浮起的基本方法是()而使颗粒浮起A.使矿物颗粒比重减小 B.使颗粒

题型:单项选择题

问题:

浮选法中使矿物颗粒浮起的基本方法是()而使颗粒浮起

A.使矿物颗粒比重减小

B.使颗粒附着在泡沫上

C.使颗粒与泡沫化学作用

D.利用颗粒与泡沫的不同比重

考点:矿业工程矿业工程题库
题型:单项选择题

You may love to see tigers at the zoo. But what if you had to stay with one on a boat on the open sea for over 200  days? Life of Pi<<少年派的奇幻漂流》 the movie from American Chinese director , Li An, tells an amazing story.Pi is a boy. He lives happily with his family in a beautiful Indian town. His father has a zoo, so Pi knows a lot about animals.

But one day, his father decides to move to Canada. He will sell all his animals there. The family begin to sail on the Pacific with all the zoo animals.   But a big storm (暴风雨) hits their ship at night. Finally, Pi finds the only survivors ( 生存者) are himself and a large tiger called Parker on an 8-meter boat. 

To keep himself alive, Pi has to keep feeding the tiger so that he himself is not eaten. He tries to get on  well with the tiger during a 227-day sail on the sea.  The movie is from a Canadian writer Yann Martels book of the same name. The book has sold 7 million copies worldwide. It discusses not only hope but also relationship(关系) between humans and nature. It took Li An four years to make the movie.  He also used 3D for his first time. He hopes the movie will make  the people think.

Life of Pi opened in Chinese theaters on November 22, 2012.

小题1: Where does Pi’s father decide to move? 

小题2:What happens when they sail on the Pacific at night? 

小题3:Why does Pi have to keep feeding the tiger? 

小题4:What does the movie discuss? 

小题5: How long did it take Li An to make the movie? 

题型:单项选择题

依那普利降压的作用原理是()

A.抑制血管紧张素与受体结合

B.抑制血管紧张素Ⅱ生成

C.抑制钠、水重吸收,减少血容量,降低心排血量

D.减慢心率,降低心排血量,抑制肾素释放

E.阻止钙离子进入心肌细胞及血管壁平滑肌细胞,使心肌收缩力降低,外围血管扩张

题型:单项选择题

男,61岁,无痛性血尿1个月余,加重3天。

根据上述病例,引起血尿症状的病变可能有()

A.尿路结石

B.原发性肾紫癜症

C.肾外病变

D.肿瘤

E.肾盂肾炎

F.肾结核

题型:单项选择题

股份有限公司以收购本企业股票方式减资的,按注销股票的面值总额减少股本,购回股票支付的价款小于面值总额的部分,依次冲减"资本公积"、"盈余公积"和"利润分配-未分配利润"。()

题型:单项选择题

某传染病的最短潜伏期为8天,最长潜伏期为22天,平均潜伏期为14天,症状期为21天,恢复期为30天,试问该病的检疫期限为()

A.8天

B.22天

C.14天

D.21天

E.30天

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