单项选择题

A．The woman will record tonight’’s program.
B．He will be having a meeting with his boss at that time.
C．His boss might ask him to stay up late.
D．He may have to prepare for tomorrow’’s business trip.
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单项选择题
A．In cold zones.B．In hot zones.C．In temperate zones.D．Any climate.
A．In cold zones.
B．In hot zones.
C．In temperate zones.
D．Any climate.
单项选择题
A．Microwaves are strange electric waves.B．Microwaves travel in straight lines and do not follow the curve of the earth’’s surface.C．There are not any wires to send microwaves.D．We must amplify microwaves in relay stations.
A．Microwaves are strange electric waves.
B．Microwaves travel in straight lines and do not follow the curve of the earth’’s surface.
C．There are not any wires to send microwaves.
D．We must amplify microwaves in relay stations.
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