A．Provide extra energy to start the reaction.B．Raise the temperature of the chemicals.
A. Provide extra energy to start the reaction.
B. Raise the temperature of the chemicals.
C. Release a chemical needed to start the reaction.
D. Lower the amount of energy needed to start the reaction.
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The seat of France's North American holdings in the eighteenth century was Quebec, and the
A. to remain
B. remaining
C. by remaining
D. has remained
A．It divides into Two different parts.B．It keeps the same chemical structure.C．It beco
A. It divides into Two different parts.
B. It keeps the same chemical structure.
C. It becomes part of a new chemical compound.
D. It produces more of the enzyme.
A．Swimming.B．Driving.C．Sleeping outdoors.D．Canoeing.
A. Swimming.
B. Driving.
C. Sleeping outdoors.
D. Canoeing.
A．It's cleaner.B．it's heavier.C．it's warmer.D．It moves more slowly.
A. It's cleaner.
B. it's heavier.
C. it's warmer.
D. It moves more slowly.
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