股指期货最早是在（）年2月由美国堪萨斯城期货交易所率先推出的。 A.1981 B.1

爪形手不常见于

A．进行性肌萎缩

B．脊髓空洞症

C．麻风

D．尺神经损伤

E．风湿性关节炎

2007年10月24日18时05分，中国第一颗探月卫星“嫦娥一号”在西昌卫星发射中心成功升空，“嫦娥奔月”成为中国航天的现实，为了方便研究，我们将“嫦娥奔月”的过程简化为：“嫦娥一号”升空后，首先进入周期为T₁的近地圆轨道，然后在地面的指令下经过一系列的变轨后最终被月球捕获，在距离月球表面为h的轨道上绕月球做匀速圆周运动．已知地球质量为M₁，半径为R₁，月球质量为M₂，半径为R₂．求：“嫦娥一号”绕月球运动时的周期T₂（最终结果用题目中的物理量为表示）．

加工贸易中凡因“出口急需”、“工艺必需”，且在同品种、同规格、同数量的前提下串换国内料顶替进口料又无牟利的，就可以串换。

本例此时临床表现符合

A．慢性肾炎综合征

B．急进性肾炎综合征

C．急性肾炎综合征

D．肾病综合征

E．尿路感染综合征

Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with (71) , and that it has a mechanism for (72) graphical files. Display text, display graphics, and (73) hyperlinks--there’s 99 percent of the (74) value. That’s not to say that the manufacturers didn’t go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client-side Java applets were supposed to become the preferred (75) for application development Remember frames and all their nasty side effects

A．Web browser’s

B．terminal’s

C．emulator’s

D．network’s