T/S at

T/S at 《运筹学》中 AT&T's CAPS 编译原理,如何消除文法的左递归G[S]:S→(T) | a+S | aT→T,S | S Don't s ____ at me ,I can hear clearly. Don't s____ out late at night .It's dangerous. you can't buy at Mr Coll's Clothes Store it's better if we don't speak at It's better refer we don't speak at 关于Δs=aT^2中T的问题. Tom's brother isn't at home right nowTom's brother isn't at home_______ _______ ______ He didn't attend yesterday’s assembly = He didn't — — at yesterday’s assembly =He didn't — — at yesterday’s assembly It's cold outside.Why------- stay at home.可不可以why don't you stay at home Look at the phto of ___.Isn't she athletic?___Sam's athletic,he isn't good at playing basketball Billy isn't at home.He isn't _____.He's _______.填介词 Look at the photo. Describe Ben's father motherBen't father was____ Ben't mother was____ 一个辆摩托车t小时行S千米,a小时行（ ）千米A.t分之as B.at分之s C.s分之at 1.一辆摩托车T小时行驶S千米,a小时行驶（ )千米.A.T分之AS B.AT分之S C.S分之AT s（t）=s(0)e^(-at)是怎么得出来的 求大神指导