GMAT逻辑题练习及答案(457)

2017-11-29 09:35

来源：新东方在线

作者：

　　Modern navigation systems, which are foundin most of today’s commercial aircraft, are made with low-power circuitry,which is more susceptible to interference than the vacuum-tube circuitry foundin older planes. During landing, navigation systems receive radio signals fromthe airport to guide the plane to the runway. Recently, one plane withlow-power circuitry veered off course during landing, its dials dimming, when apassenger turned on a laptop computer. Clearly, modern aircraft navigationsystems are being put at risk by the electronic devices that passengers carryon board, such as cassette players and laptop computers.

　　Which one of the following, if true, LEASTstrengthens the argument above?

　　A. Afterthe laptop computer was turned off, the plane regained course and itsnavigation instruments and dials returned to normal.

　　B. Whenin use all electronic devices emit electromagnetic radiation, which is known tointerfere with circuitry.

　　C. Noproblems with navigational equipment or instrument dials have been reported onflights with no passenger-owned electronic devices on board.

　　D. Significantelectromagnetic radiation from portable electronic devices can travel up toeight meters, and some passenger seats on modern aircraft are located within fourmeters of the navigation systems.

　　E. Planeswere first equipped with low-power circuitry at about the same time portableelectronic devices became popular.

　　答案：E

　　思路： E是无关选项，同时装备无法支持飞机航行受电子设备干扰。其他选项都能支持。

　　A, 加强选项，关了电玩后，飞机就正常了，说明电玩有影响。

　　B, 加强选项，直接说电玩影响飞机电路。

　　C, 没有电玩，飞机没影响，相对加强力度弱些，但比起E来也能勉强算做加强。

　　D, 加强选项，电玩八米有影响，有些乘客就坐在电路八米内。

以上就是本文的全部内容，更多精彩请随时关注新东方长春学校官网。