皮皮学，免费搜题
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【多选题】
根据矿石中脉石的成分和焦炭中灰分成分的不同，高炉冶炼使用的熔剂可分为 、 和 三种熔剂。A.
碱性
B.
酸性
C.
中性
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举一反三
【简答题】Words Dictation Listen to the definitions of the words and phrases, try to write down the right word or phrase. dictation 2.mp4
【简答题】I. Dictation Listen to the following passage and write down the whole passage according to what you heard.
【简答题】Dictation Listen to the passage for 5 times and try to write down the exact words you have just heard.
【简答题】Compound Dictation Listen to a short passage concerning language learning and fill in the missing information.
【简答题】Spot dictation Listen to the following passage and fill in the blanks with the missing words
【简答题】Words Dictation Listen to the definitions of the words, try to write down right words. Unit 1.mp4
【简答题】Spot dictation Listen to the following passage and fill in the blanks with the missing words
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