Hello! My name is Mike. I am from the USA. Now I am in China with my parents. I like China. I like Chinese food, too. I have breakfast at home. I eat an egg, bread and porridge(粥)for breakfast. I do not like milk. I have no time to go home for lunch. So I have it at school. The lunch in our school is good. I can have different food for lunch. I eat rice, meat and vegetables. Sometimes I have noodles（面条） and dumplings(饺子). I have dinner at home with my parents. Sometimes we go out to eat with friends. We have chicken, vegetables and fruit.

李斌同学在小学时成绩优秀，经常得100分，于是他认为自己比谁都强；可是，上了中学，他的成绩却不理想，有时甚至不及格，于是他又觉得谁都比自己强。老师说李斌没有正确认识和评价自己。请你告诉李斌可以（     ） 

汽车内燃机汽缸内汽油燃烧时，气体体积膨胀推动活塞对外做功．已知在某次对外做功的冲程中，汽油燃烧释放的化学能为1×10³J，因尾气排放、汽缸发热等对外散失的热量为8.0×10²J，该内燃机的效率为____．随着科技的进步，可设法减少热量的损失．则内燃机的效率能不断提高．其效率____（选填“有可能”或“仍不可能”）达到100%．

一个长方体的棱长之和是90厘米，它的长、宽、高之比是4：3：2，长方体的表面积和体积各是多少？