单项选择题

The article was written to explain ______.

A．the greenhouse effect
B．the models of solar-weather interactions
C．the solar effects on earth
D．the causes affecting weather
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单项选择题
The Caucasian example indicates that ______.
A．South African companies are plagued with a guilty feeling
B．South Africans are overjoyed with the overseas investment
C．South Africans owe debts to Caucasian company
D．South African companies take advantage of their counterparts' guilty feelings
单项选择题
This passage mainly discusses that ______.
A．cultural differences force companies to adjust schedule
B．marketing success and failure are much like history
C．developing countries are hostile to developed countries
D．the history of a country or culture influences the market
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