问题
单项选择题
一般来说,COSMO压力产生变化的原因是()。
A、被测零件存在泄漏
B、检测夹具的密封件损坏或脏污
C、气动元件泄漏
D、所有上述原因
答案
参考答案:D
一般来说,COSMO压力产生变化的原因是()。
A、被测零件存在泄漏
B、检测夹具的密封件损坏或脏污
C、气动元件泄漏
D、所有上述原因
参考答案:D
One day in April, No. 1 Middle School held a special activity called “Food.Street” on the playground in Xi’an.小题1:. The students in each class formed some groups. Each groupsold different kinds of foods.小题2:Thestudentscookeddeliciousfoodsuchasfriedchicken, potato chips and vegetables. 小题3:Thecustomerswereallthestudents,teachersand parents. 小题4: “It’s really hard work.” said one of the students, “We must make a plan before the cooking. We must know the cost of the food. Also, we must learn how to serve customers well.” “ This activity is to give a practical(实践的)chance to the students,” said a teacher, “ What’s more,the students will not only learn how to make money by their own hands, but also know the meaning of life.”
|