'Who are the visitors?''They are all______ I think. '
A．mathematics student
B．mathematics students
C．mathematics' students
D．student of the mathematics

未分类题What can we learn from the passage?A．People can hardly get Vitamin D from daily diet.B．Heavy use of sunscreen can promote the Vitamin D production by the body.C．The Vitamin D density is strengthened in milk and bread.D．The standard amount of Vitamin D intake keeps no change for kids and adolescents.

未分类题You cant imagine______.A．what did we have awful weatherB．what weather awful did we haveC．what awful weather we did haveD．what awful weather had we

判断题财务费是指财务人员发生的费用。()

未分类题Peter used to live in London, ______?A．usedn't heB．wasn't heC．didn't he useD．didn't he use to

判断题材料费中包括材料的二次搬运费。()