按被保险人的年龄分类,人身保险的种类包括______等
A.老年保险和成人保险B.健体保险和标体保险C.儿童保险和成人保险D.社会保险和商业保险
参考答案:C
We have more than 80 flats in this building, each ____ solar heaters.
A.is equipped with
B.equipped with
C.is equipped by
D.equipped by
请指出下列音程不协和的是( )
A.大三度
B.增十度
C.纯十二度
D.小六度