is it doing harm to do.是反问句吗?常见反问句还有哪些?

is it doing harm to do.是反问句吗?常见反问句还有哪些? It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么btw:此处的harm是什么词性?名词?no可不可以改成not a harm(既然harm是名词） do harm to doing还是do Noise pollution is doing much harm to our health now谢谢了, It's known to us_______there is pollution,there is harm.高一英语单选 It is known to us all_ _ _ _ _there is harm.哪儿有污染 英语 It is (know)to all that su danhongdoes harm to our health it is fun to do 还是 doing? It is worth to do还是doing It is useless to do?doing? do harm to do sth.还是 do harm to doing sth. Although fast food is t_____,it does harm to our health. It is believed that smoking does harm to health =Smoking is_________________ 请问一下是do harm to do还是doing It is known to us ___ where is pollution there is harm.A.whichB.whereC.whatD.that once harm is done to the environment,it takes years to have the system _A recoverB recoveringC recoveredD to recover It is k___ to all that sudan I(苏丹红1号) does harm to our health Drinking polluted _water the healthA do harm to B does harm to C is harmful for B does harm to