1. A device which converts chemical energy into electrical energy is called __________.
A. motorB. generator
C. moving-coil meter
D. battery
2. The Sun is a __________.
A. Star
B. PlanetC. Asteroid
D. Meteor
3. The average adult has a blood volume of about __________ liters.
A. 4B. 5
C. 6D. 7
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