需要 各位高人 明示
<br /="/"/><div><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">12. The only physical factor preventing a human journey to Mars has been weight. Carrying enough fuel to propel a conventional spacecraft to Mars and back would make even the lightest craft too heavy to be launched from Earth. A device has recently been invented, however, that allows an otherwise conventional spacecraft to refill the craft's fuel tanks with fuel manufactured from the Martian atmosphere for the return trip. Therefore, it is possible for people to go to Mars in a spacecraft that carries this device and then return.</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">Which one of the following is an assumption on which the argument depends?</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">(A) The amount of fuel needed for a spacecraft to return from Mars is the same as the amount of fuel needed to travel from Earth to Mars.</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">(B) The fuel manufactured from the Martian atmosphere would not differ in composition from the fuel used to travel to Mars.</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">(C) The device for manufacturing fuel from the Martian atmosphere would not take up any of the spaceship crew's living space.</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">(D) A conventional spacecraft equipped with the device would not be appreciably more expensive to construct than current spacecraft typically are.</span><span style="display:none;">www.ddhw.com</span></p><p align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 165%; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan"><span style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: 宋体; mso-highlight: yellow; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Verdana; mso-bidi-font-family: Arial"> </span><span lang="EN-US" style="FONT-SIZE: 10pt; BACKGROUND: yellow; LINE-HEIGHT: 165%; FONT-FAMILY: Arial; mso-highlight: yellow; mso-font-kerning: 0pt">(E) The device for manufacturing fuel for the return to Earth weighs less than the tanks of fuel that a conventional spacecraft would otherwise need to carry from Earth for the return trip.</span></p></div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div>我想答案是
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/><div>E.</div><div> </div><div>你有疑问的话请提出, 我可有针对性地解释.</div><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></td></tr></table>想起了GRE逻辑考试[:-K][:-K][:-M]
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/><div></div><div>我想答案应该是E。</div><div>这是LSAT或者GMAT的题？？现在GRE不考逻辑了不是么？？<img /="/" src="http://info.ddhw.com/img/8.gif"></img></div><br /="/"/><br /="/"/> <span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <p><div align="right"><font color="#ff0000" style="BACKGROUND-COLOR: #c4dfff"> 本贴由[<b>色盲</b>]最后编辑于：2008-11-14 0:4:51 </font></div><div style="MARGIN-TOP:20px;MARGIN-LEFT:5px;MARGIN-BOTTOM:10px"><br /="/"/><img /="/" src="/img/sign.gif"></img><a href="http://www.ddhw.org" target="_top"><span style="FONT-SIZE:12px;COLOR:#999999;font-weight:bold">www.ddhw.org</span></a>---<div style="width:450px;MARGIN-LEFT:10px"><div></div><p><input /="/" src="http://upload.ddhw.cn/image/2008/05/28/9889.jpg" style="CURSOR: default" type="image"/></p><p>据说这世界是彩色的？<div> </div><div></div></p></div></div></p></td></tr></table>
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