【多选题】霾,主要指原因不明的因大量烟、尘等微粒悬浮而形成的浑浊现象。PM10是指空气中直径等于和小于10微米的颗粒物。根据目前的认识,机动车尾气排放、煤炭燃烧和工业生产的燃烧过程中排放的二氧化硫和氮氧化物等都是PM2.5的主要来源。它会对人的呼吸系统、神经系统等产生影响。 (2)“三效催化转换器”能将汽车尾气中的有毒气体转为无毒气体。图乙为其反应的微观示意图,下列说法正确的是 ( 选填序号)。
C.
该反应能将引起 雾霾 的NO 2 和CO气体转化为N 2 和CO 2
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn't know where to spend it. He spoke to his friend Bill,'I 1 the hot weather, but I can't find a cool place in Ame...
【简答题】Mr. Li worked in a post office in Weihai. Last month he retired. His son works in America. Five years ago Mrs. Li went to America to look after their grandson. So Mr. Li decided to see them. Mr. Li wa...
【单选题】使用餐巾时,不可以用餐巾来( )。 A.擦嘴角的油渍 B.擦手上的油渍 C.擦拭餐具
【单选题】Last month he promised that he ______ today, but he hasn't arrived yet.
【单选题】某企业为一般纳税人,销售甲产品60件,单价1500元/件,增值税税额为15300元,款项尚未收到,应编制的会计分录为( )。
A.
借:银行存款 105300贷:主营业务收入 90000应交税费一一应交增值税(销项税额) 15300
B.
借:应收账款 105300贷:主营业务收入 90000应交税费一一应交增值税(进项税额) 15300
C.
借:应收账款 105300贷:主营业务收入 105300
D.
借:应收账款 105300 贷:主营业务收入 90000应交税费一一应交增值税(销项税额) 15300
【简答题】完形填空。 Mr Black is a farmer. Last month he drove his car to a town and on the way his car knocked down a boy and hurt him. He sent the boy to a hospital at 1 .He paid a lot of money for that, but the b...
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn’t know where to spend it. He spoke to his friend Bill,“I 1 the hot weather, but I can’t find a cool place in Ame...
【单选题】Joe liked hunting very much. Last month he came back from Africa and said that he would not go hunting any longer. He told me his experience as follows(如下). One morning I was walking in the forest and...
A.
hunting in Africa was terrible
B.
he had been hunting for a long time
C.
he had been hunting for a short time
D.
he had had a terrible experience