下面是有关PPoint演示文稿播放控制方法的描述，其中( )是错误的。A．可用键盘控

王某是上海期货交易所的会员，想在2010年10月12日买入铜期货合约2000手(5吨/手)，价格为65000元/吨。根据最低保证金要求——合约价格的5%，王某需要缴纳3250万元的保证金。王某想用其拥有的国债充抵，国债按照期货交易所规定的基准价计算的价值为4000万元；另外，王某在期货交易所专用结算账户的实有货币资金为700万元。那么，王某用国债充抵保证金的最高金额是( )万元。

A．2800

B．3000

C．3100

D．3200

昏迷患者，刺激后上肢和下肢呈伸直状，肌张力增高

A．两性霉素B
B．氟康唑
C．5-氟胞嘧啶
D．泼尼松
E．吡哆醇

2015年惠州月平均工资是多少？比14年多多少？

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

为什么长期使用阿司匹林会引起胃肠道副作用？