如图6所示,水平放置的平行金属板ab间存在正交的匀强电场E和匀强磁场B,a、b板

题型:填空题

问题:

如图6所示,水平放置的平行金属板ab间存在正交的匀强电场E和匀强磁场B,a、b板带有等量异种电荷,a板带正电,一带电量为q的正离子以初速度v0射入,恰好能沿直线AB从右边射出,则磁场方向________________,速度v0=______。若v= v0=E/B,则

粒子做匀速直线运动,与粒子的________、________、________无关

考点:带电粒子在复合场中的运动
题型:填空题

依据《防沙治沙法》,在沙化土地封禁保护区范围内,禁止的行为有()。

A.安置移民

B.水保工程

C.修建铁路、公路

D.—切破坏植被的活动

题型:填空题

下列各项中,目前免征或不征营业税的有( )。

A.房地产开发企业代收的住房专项维修基金

B.个人提供的垃圾处置劳务

C.保险企业取得的追偿款收入

D.军队出租空余房产取得的租赁收入

题型:填空题

对胰岛素急性耐受性产生原因描述错误的是

A.严重创伤
B.乳酸性酸血症
C.血浆中存在抗胰岛素抗体
D.并发感染
E.情绪激动

题型:填空题

Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They are thereby shut (1) from the world of books and newspapers, having to (2) on friends to read aloud to them.

A young scientist named Raymond Kurzweil has now designed a computer which is a major (3) in providing aid to the (4) .His machine, Cyclops, has a camera that (5) any page, interprets the print into sounds, and then delivers them orally in a robot-like (6) through a speaker. By pressing the appropriate buttons (7) Cyclops’s keyboard, a blind person can "read" any (8) document in the English language.

This remarkable invention represents a tremendous (9) forward in the education of the handicapped. At present, Cyclops costs $ 50,000. (10) , Mr. Kurzweil and his associates are preparing a smaller (11) improved version that will sell (12) less than half that price. Within a few years, Kurzweil (13) the price range will be low enough for every school and library to (14) one. Michael Hingson, Director of the National Federation for the Blind, hopes that (15) will be able to buy home (16) of Cyclops for the price of a good television set.

Mr. Hingson’s organization purchased five machines and is now testing them in Maryland, Colorado, Iowa, California, and New York. Blind people have been (17) in those tests, making lots of (18) suggestions to the engineers who helped to produce Cyclops.

"This is the first time that blind people have ever done individual studies (19) a product was put on the market," Hingson said. "Most manufacturers believed that having the blind help the blind was like telling disabled people to teach other disabled people. In that (20) , the manufacturers have been the blind ones.

17()

A.producing

B.researching

C.ascertaining

D.assisting

题型:填空题

某企业在人民法院受理其破产案件前6个月至破产宣告之日的期限内,非正常压价出售其所有的一栋办公楼,直至破产程序终结也未被发现,对该企业的这一行为的处理,表述正确的选项是()。

A.人民法院应当追回该财产,再依《破产法》有关规定处理

B.人民法院不能依职权追回该财产,除非债权人提出请求

C.这一行为在破产程序终结之日起1年内被发现的,由人民法院追回财产,按《破产法》有关规定处理

D.人民法院应当追回该财产,并且予以没收,上缴国库

更多题库