The passage is mainly about______. Which of the following is true, according to the passage?

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问题 The passage is mainly about______.
Which of the following is true, according to the passage?

选项 A、Current rockets are vulnerable and unstable.
B、New propulsion system has been developed.
C、People consider loser beams as a possible solution to developing new propulsion system.
D、At present, nuclear energies can be used in propulsion systems.

答案C

解析细节题。题意为："下列哪句是正确的?"根据文中第三段第三句(另一些人利用核能或者采用强大的激光束来研制新的推进系统)，可知选项"人们将激光束作为研制推进系统的一种可能的解决方法"，为正确答案。选项"目前的火箭不稳定，不堪一击"文中未提及。

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考研英语一

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The passage is mainly about______. Which of the following is true, according to the passage?

考研英语一

Airpollutiontriggersmoreheartattacksthanusingcocaineandposesashighariskofsparkingaheartattackasalcohol,cof

Humanlanguageisthesubjectofendlessscientificinvestigation,butthegesturesthataccompanyspeechareasurprisinglyneg

Fromantiquitytomoderntimes,thenationhasalwaysbeenaproductofinformationmanagement.Theabilitytoimposetaxes,pro

Writeanessaybasedonthefollowingchart.Inyourwriting,youshould1)interpretthechart,and2)giveyourcomments.You

WhatisthedifferencebetweenJoeSix-Pack,JoethePlumberandJoeBiden?Oneisvicepresident;theothertwoarenot.Why?T

A.GenderdifferentiatorB.MarkofPersonalityC.AdoptionofforeigndrinksD.StatementofaffiliationE.Sit

WhenGeorgePricediedinJanuary1975,hisfuneralinLondonwasattendedbyfivehomelessmen:untidy,smellyandcold.Alongs

The215-pagemanuscript,circulatedtopublisherslastOctober,______anoutburstofinterest.

Inthefollowingarticle,somesentenceshavebeenremoved.ChoosethemostsuitableonethelistA—Gtofitintoeachofthenu

WhatisthemissionofthedelegationofPakistaniofficialstoAfghanistan?Accordingtothetextallthefollowingstatements

A、改变宫腔内环境，妨碍受精卵着床B、杀精子或改变精子功能C、抑制排卵D、改变宫颈黏液性状，不利于精子穿透E、阻止精子进入宫腔阴茎套的避孕原理是（）

妊娠期间药物代谢的变化是

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网络计划的关键线路是( )。

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执行以下程序后，test.txt文件的内容是(若文件能正常打开)()。#include＜stdio.h＞main(){FILE*fp；char*s1="Fortran"，*s2="Basic";

网络计划的关键线路是(　　)。

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