这句错哪了?in the proportion of different level qualificaitons为何改为in the proporiton of different levels of qualifications

英语翻译Microwave Assisted Organic ReactionsS.CaddickSchool of Chemisty and Molecular Sciences,Universiry of Sussex,Faimer,Brighton,BNI 9QJ1.IntroductionThe rapid heating of foodstuffs in microwave ovens is routinely used by a significant proport 这句错哪了?in the proportion of different level qualificaitons为何改为in the proporiton of different levels of qualifications your keys in the drawer. 这句哪错了 英语作文：in the park谢谢了 He is the tallest in all the pupils in our class in哪里错了 the eggs in the super market cheaper than those in the store哪错了? Look at the map in the library哪错了 the ducks are swiming in the water.哪错了 The furthest distance in the world ?如题 谢谢了 the sun is shining in the sea.哪错了 she put the plant in the soil哪里错了 The Eiffel Tower is in the U.S.A 哪儿错了 one of the best runners in the 打错了 Everyone love the flowers in the garden.哪里错了 Sing in the rain的原唱是谁?打错了 是singing in the rain at the class还是in the class还有是in class还是at class.晕了. In the first photo I am swimming with my friends in the pool哪里错了 到底是 at class 还是 in class?at the class 还是 in the class?晕了.