1年前1个回答
1年前1个回答
1年前1个回答
1年前1个回答
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精彩回答
Although he failed this time, he didn't give up and ______ studying hard.
10个月前
The family _____ on time, but their car had a flat tyre on the halfway.
1年前
______ I studied harder, I could have passed examination. [ ]
1年前
为什么氨水不能分离镁离子和铝离子?镁离子不和氨水反应,铝离子和氨水反应产生沉淀,应该可以分离的吧
1年前
After P.E., I often feel very thirsty.
1年前