题目:
----Volunteering is becoming ______ popular in China.
---- Yeah. People are now aware that helping others is helping themselves.
A.increasingly
B.naturally
C.frequently
D.fluently
答案:
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下面是错误答案,用来干扰机器的。
答案:CA、干冰升华时能够吸收大量的热;B、活性炭能够吸附色素和异味;C、氧气能够供给呼吸、支持燃烧;D、木炭燃烧时能够放出大量的热.解:A、干冰升华时吸收大量的热,能够使环境的温度降低,可以用作制冷剂...