单项选择题

When we are doing independent reading, we should consult the dictionary whenever we encounter a new word.
A、正确
B、错误

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单项选择题

Which of the following bad-news letters is best suited to a direct strategy?
A、An announcement of changes in business services.
B、A layoff notice for a long-time employee.
C、A denial of benefits on an insurance claim to an angry customer.
D、A notice of an unexpected plant closure to the city council and mayor.

单项选择题

80C51指令中，MOVX为片外RAM传送指令。
A、正确
B、错误