There are two main things that make aircraft ...please translateThere are two main things that make aircraft engineering difficult; the need to make every part as reliable as possible and the need to build everything as light as possible,

there are not only two main streets there are not only two main streets which across the midlle of 这句话有错么、 哪错了? there are two t.students ithere are two t. students in my school There are two funny pictures on the wall (t ). 英语的完形填空There are two main kinds of sportsThere are two main kinds of sports.these two kinds of sports are taem sports and individual sports.Teams sportsare such as baseball ,basketball and volleyball . there are some 还是there are two There are two main things that make aircraft ...please translateThere are two main things that make aircraft engineering difficult; the need to make every part as reliable as possible and the need to build everything as light as possible, there are two libraries in our school,__?A、aren't there B、are there C、aren't they D、are they there are two bears o-- there The fatory is very big.There are two t() and five hundred workers in it They are the two main characters in the play. there are not only two main streets which across the midlle of the town这句话有错么.哪错了. I don't think so.There()anyChinese books in my bag,but there are two English books 英文翻译：There are same two.和 There are fifty. there are two kinds of memory there are two chairs and a desk There are two farmers ( ) the apple trees There are two pictures ) the wall Are there d_ between the two pictures?