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Inventors have changed the way we live.So they are famous for the great things they___.为什么did? Many useful machines were __1__ by inventors.These machines have __2__Many useful machines were __1__ by inventors.These machines have __2__the world a lot.There are many great inventors in the world,and Watt was one of them.Watt was English.When he 1)CH3--CH--CH--CH3| |CH3 CH2|CH3 2)CH3--CH--CH--CH--CH--CH3| | | |CH3 CH3 CH2 CH3|CH33)CH3--CH--CH2--CH3|C2H5CH3--CH--CH--CH3 ..............|...........| ..............CH3...........CH2 ..............| ..................CH3 2)CH3--CH--CH--CH--CH--CH3 共10题，每题1分。) 1． 【72592】 Without the work of scientists and inventors before him，Thomas Edison _____ so much．A． didn't achieveB． wasn't able to achieveC． wouldn't have achievedD． shouldn't have achieved2． 【72634】 W 1、-Inventors have changed the way we live.-So they are famous for the great things they_____.A,do B,did C,are doing D,had done应该选B,但为什么不能选D的完成时呢2、although i am beginning to feel more comfortable about depending on my 1---Not yet.I’ll search some on the Internet.---I feel very happy that I ____to be the host.---Congratulations!A.choose B.am chosen C.was chosen D.haven chosen2---Inventors have changed the way we live.---So they are famous for the great things the Inventors have changed the way we live.So they are famous for the great things they___.为什么填did而不是had done呢? Inventors have changed the way we live.so they are famous for the great things they____A.do B.did C.are doing D.had done 录像机 1 CH Audio 我看不懂?Thomas Edison was one of the greatest inventors in the world.Without his inventors,people may not have lights,films and many other things.But this very elever man had very little scholing.Edison began to make a talking machine in 1877.At 用系统命名法命名下列物质,1 CH3-CH-CH2-CH-CH-CH2-CH2-CH3∣ ∣ ∣C2H5 C2H5 CH32 CH3-CH-CH2-CH2-CH-CH-CH3∣ ∣ ∣CH3 C2H5 C2H5CH3 C2H53 ∣ ∣CH3-CH-CH2-CH-CH∣ ∣C2H5 CH(CH3)24 CH3CH-CH2CH3∣C2H5C2H55 ∣CH3-CH-CH2-CH-CH-CH3∣ ch3-- ch ---ch---ch3 1 1 oh ch3 是什么 c语言中 (ch-ch%32+26)-(ch%32-1));怎么理解?具体问题是这样的：main(){char ch;scanf(%c,&ch);if(ch>'A'&& ch=‘a’&& ch >CH-CH 1W×2ch是什么意思 1 watch的ch teacher的ch Chinese的ch shirt的ch 哪个读音与其他三个不同? CH2-CH-CH=CH2 些化学方程式 注明条件和类型CH2-CH-CH=CH2 (1,4 加聚) CH2-CH-CH=CH2 些化学方程式 注明条件和类型CH2-CH-CH=CH2 (1,4 加聚)