单项选择题

A．People in small villages.
B．Large public interest groups.
C．Operators of conventional communicational systems.
D．Managers of international business groups.
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单项选择题
A．Asking for some financial aid.B．Lending something to a student.C．Reading a student’s application.D．Borrowing money for a business.
A．Asking for some financial aid.
B．Lending something to a student.
C．Reading a student’s application.
D．Borrowing money for a business.
单项选择题
A．Why fog freezes at low temperatures.B．How very small droplets can form.C．Why the density of fog varies.D．How water droplets stay suspended in air.
A．Why fog freezes at low temperatures.
B．How very small droplets can form.
C．Why the density of fog varies.
D．How water droplets stay suspended in air.
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