请问Moving at a high speed for a long time put Sergei a second into the future是什么意思

请问Moving at a high speed for a long time put Sergei a second into the future是什么意思 懂英文的进.A light is at the top of a pole 80ft high.A ball is dropped at the same height from a point 20ft from the light.Assuming that the ball falls according to the law s=16t^2,how fast is the shadow of the ball moving along the ground one s what high speed the coaster is moving at 后为什么加at look,()high speed the roller coaster()!Ahow,is movingBwhat,is movingChow,is moving atDwhat ,is moving at The car is moving ___ such___ high speed that it can't stop at once 单项选择A in,aB in,.不填C at,aD at.不填 she now works as a math teacher at a high school work为什么+sshe now works as a math teacher at a high school work为什么+s 请问it's high time 的用法 with a high speed 还是at a high speed?China has developed -- such a high speed. 翻译it's moving. in his high s ---at first填什么 速度快是at a high speed 还是at the high speed at high speed 还是at a high speed,教材上是前一种两者区别是什么? at high/fast speedat high speed or at fast speed,要不要加a 1) He teaches singing at a high school and is acknowledged to be ___ singer as he is a teacher.A so good aB as good a C a so good aD a good2) Courage means moving forward ____ you are afraid that you might not accomplish what you want.A even ifB even 英语翻译A bolt comes loose from underneath an elevator that is moving upward at a speed of 4.2 m/s.The bolt reaches the bottom of the elevator shaft in 3.7 s. The temperature at the sun's center is _______ 10000000 centigrade.The temperature at the sun's center is _____ 10000000 centigrade.A.high enough as B.so high as C.such high as D.as high as为什么选D?as … as … 和 so…as… 不是一样的吗 It is whirling winds moving voilently at very high speed .It can destroy everything on the groundin its path.(接着上面的） 求中文 ,· A man starts walking north at 6 ft/s from a point P.Five minutes later,a woman starts walking south at 4 ft/s from a point 470 ft due east of P.At what rate ( in ft/s ) are the people moving apart 15 min after the woman starts walking?Please round yo