从狭义上讲,指数是表明()。
A.总体数量综合变动的绝对数
B.总体数量综合变动的相对数
C.复杂总体数量综合变动的绝对数
D.复杂总体数量综合变动的相对数
参考答案:D
Tom is only ______.
I don’t think a _______ boy should be allowed to drive.
A.fourteen-year-old;fourteen-year-old
B.fourteenyearsold;fourteen-year-old
C.fourteenyearsold;fourteen-years-old
D.fourteen-year-old;fourteenyearsold
园产品为何要进行包装?