A．A boom period of photography.B．The official date of the peak of photography.C．The of
A boom period of photography.
B. The official date of the peak of photography.
C. The official date of the beginning of photography.
D. A meaningless year of photography.
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A．There is a greater demand of clean water.B．More water sources are polluted or disapp
A. There is a greater demand of clean water.
B. More water sources are polluted or disappearing.
C. Developed countries consume too much water.
D. More water is ruined and developed countries consume too much.
【S18】
A. prestige
B. determination
C. characteristic
D. choice
A．They produced more cars than American manufacturers.B．They reduced car-production in
A. They produced more cars than American manufacturers.
B. They reduced car-production in America.
C. They gave up more market share to the natives.
D. They took over plants and manufacturing capacity.
How did cable providers solve the problem of the earliest cable systems？
A. They strategically placed antennas with very long cables connecting to subscribers' television sets.
B. They made the signal from the antenna travel through the length of cable.
C. They inserted amplifiers at regular intervals.
D. They increased the length of cable.
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