问题
选择题
The water in the ocean also keeps the temperature of the earth steady by absorbing and _____heat.
A．giving away
B．giving up
C．giving back
D．giving off
答案
答案：D
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The water in the ocean also keeps the temperature of the earth steady by absorbing and _____heat.
A．giving away
B．giving up
C．giving back
D．giving off
答案：D
为残根，位于龈上1～1.5mm，叩（-），无松动。患者要求仅修复