原料重量的计算方法是（）。
A.材料密度³体积
B.材料密度³面积
C.材料密度³长度
参考答案：A
conceited
A．gifted
B．scared
C．watched
D．determined
根据首字母提示补全单词。
1. I learn English to c______ better with foreigners.
2. The girl is going to learn to play an i______, like violin next year.
3. The old man exercises every day. He looks h______ than before.
4. I never speak to a f______ before.
5. I like singing. My mother makes me take s______ lessons every week.
