【单选题】Senator Smart, who understands economic principles, is trying to convince workers in her district that trade with other countries is beneficial. Senator Smart should argue that trade can be beneficial
A.
only if it allows us to obtain things that we couldn't make for ourselves.
B.
because it allows specialization, which increases total output.
C.
to us if we can gain and the others involved in the trade lose.
D.
in only a limited number of circumstances because others are typically self-interested.
【判断题】旅游资源包括自然旅游资源、人文旅游资源和社会旅游资源。其中,社会旅游资源为无形旅游资源,包括旅游服务质量、居民生活方式、居民好客态度等。
【简答题】腹膜腔由__和__互相延续、移行,共同围成不规则的潜在性腔隙。
【简答题】旅游资源包括的范围很广,种类繁多,按照其形成的条件,可将旅游资源分为____旅游资源和人文旅游资源。
【单选题】账户是根据( )开设的,用来连续、系统地记载各项经济业务的一种载体
【单选题】It was a fixing sight: there, in the Capitol itself, a U.S. Senator often mocked for his halting, inarticulate speaking, reached deep into his Midwestern roots and spoke eloquently, even poetically, a...