土壤空气与大气比较：（）
A.CO2少
B.O2多
C.水汽多
D.还原气体少
参考答案：C
具有滋阴清热功能的药是
A．虫蛀B．霉变C．酸败D．挥发E．沉淀
Student loan is supposed to provide financial support for people who would ________ not be able to go to college.
A．otherwise
B．meanwhile
C．therefore
D．nevertheless
