单项选择题

A．Lowering its prices.
B．Selling more household necessities.
C．Changing its memhership rules.
D．Opening up more checkout lines.
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单项选择题
A．six, more than 100B．two, more than 200C．two, more than 100D．six, more than 200
A．six, more than 100
B．two, more than 200
C．two, more than 100
D．six, more than 200
单项选择题
A．Scientists at the Kennedy Space Center are attempting to grow vegetables that could survive.B．In the special containers plants can develop rapidly in a short period of time.C．Scientists are also attempting to genetically design some of these plants to contain high levels of protein.D．Space agency scientists hope to test some version of the experimental gardens on the planned space station.
A．Scientists at the Kennedy Space Center are attempting to grow vegetables that could survive.
B．In the special containers plants can develop rapidly in a short period of time.
C．Scientists are also attempting to genetically design some of these plants to contain high levels of protein.
D．Space agency scientists hope to test some version of the experimental gardens on the planned space station.
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