【判断题】依据草坪草用途将草坪草分为观赏草坪草、固土护坡草坪草、防止环境污染草坪草三种类( )
【单选题】In the opening paragraph, the author introduces his topic by ____.
B.
justifying an assumption
D.
explaining a phenomenon
【单选题】In the short-run, following the opening of trade:
A.
a. workers in the country can change jobs but will receive the same wage.
B.
b. workers will suffer from lower wages but land owners will benefit from higher rents.
C.
c. all groups tied to declining sectors of the economy will suffer from lower returns.
D.
d. gross output remains constant.
【单选题】20世纪30年代,中国共产党内最早提出反对教条主义任务的领导人是(,2001年)