题目:
I ______ some clothes to charity because they were too small for me. [ ]
A. gave away
B. gave out
C. gave up
D. gave in
答案:
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【讨论分析】SO2是一种有刺激性气味的气体,与现象不符 H2和O2的混合物【实验步骤】⑵增大反应物的接触面积,加快反应速率⑶排出装置中的空气,防止爆炸【实验现象】⑴产生气泡,有红色固体出现,溶液由蓝色逐...