答案说A正确,我认为B是对.究竟A,B哪个正确

答案说A正确,我认为B是对.究竟A,B哪个正确 下列计算中正确的是? A .2的零次方=0 B.a+a=a平方 C.根号下9=正负3 D.（a的三次方）的平方=a的六次方.答案说D正确 但我认为C D 都正确. 到底哪个对?为什么? 急~ 究竟是A还是B,或者是其他答案, 答案究竟是什么,话说老师一会说B一会说A求解释 will they _study at home A：has to B：have to C：must D：can 老师说答案是B,但我认为D也行,为什么是B Mother asked me A:what was wrong with me B:what's wrong with me 答案选的是A,我认为B是对的啊? Would you mind giving me a ___?I want to smokeA.fire B.light 答案给的是B.我认为是A到底哪一个对为什么谢谢 有一道判断题：A除B=5,则A是B的倍数.我认为这道题是对的,可为什么答案上是错的呢? 有一道判断题：A除B=5,则A是B的倍数.我认为这道题是对的,可为什么答案上是错的呢? 答案说是A,可是我认为是D,到底那个对呢?The letter is from my sister ,_____is working in Beijing.A which B thatCwhom Dwho A,B,c,那个答案是对 一道高中数学题,答案是A,我认为是B求解释.第4题 Your computer doesn't work now ,is there _____ with it A.something wrong B.anything wrong为什么选B不选A我认为是A可答案是B的说 Although the working mother is very busy,she still( )a lot of time to children.A.offers B.provides C.devotes答案是C选项,我认为A.B也正确,都是提供sth to sb,为什么不能选呢? we waited ages for a taxi,we gave up___and walked home.A.in the end B.at last我认为二个选项都对,为何答案说A对? How long __ Leo__ yesterday? He was very tired when he was back from the skating club.A did; skate B has ; been skating 选择哪一个,我认为A是 正确的,但答案是B.为什么? 快.我认为所有选项都对,a.b.为什么不对 一个字符的ASCII码的长度是哪一项? A、7 bits B、8 bits C、16 bits D、6 bits 到底哪项是正确的?有的说A,也有说B对,请高手给个准确的答案,谢谢!