颈部淋巴结结核多见于（）。
A.婴幼儿
B.儿童
C.青少年
D.成人年
E.老年人
参考答案：B, C
森林资源资产评估操作程序有哪些？
Given the following possibilities, which one results in an increase in total consumer expenditures（）
A. demand is unitary elastic and price falls.
B. demand is elastic and price rises.
C. demand is inelastic and price rises.
