单项选择题


A．studies
B．investigates
C．selects
D．searches
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单项选择题
A．convincinglyB．convenientlyC．contemporarilyD．consequently
A．convincingly
B．conveniently
C．contemporarily
D．consequently
单项选择题
A．equipmentB．applianceC．apparatusD．instrument
A．equipment
B．appliance
C．apparatus
D．instrument
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