属于五碳糖的是（）
A.鼠李糖
B.葡萄糖
C.甘露糖
D.半乳糖
E.木糖
参考答案：E
－I like to ______ my car to work.
－But I like to go ______ subway.
A．take, take
B．use, on
C．drive, by
D．ride, with
﹣x3y+3x2﹣7的次数是（ ）．
