单选题：听第下列材料，请回答题：The main purpose of writing these three texts is

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题目内容：
听第下列材料，请回答题：

The main purpose of writing these three texts is_________.
参考答案：
答案解析：

患者6个月前，上前牙小洞在外院复合树脂充填后一直有冷热痛。近1周疼痛加重，不敢咬合。查：右上中切牙近中舌侧充填体完好，叩

患者6个月前，上前牙小洞在外院复合树脂充填后一直有冷热痛。近1周疼痛加重，不敢咬合。查：右上中切牙近中舌侧充填体完好，叩诊(++)，扪痛(+)，牙髓无活力。该患

分类：公共英语二级  题型：单选题
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The noise killing system is not yet popular mainly because__

The noise killing system is not yet popular mainly because__________.

分类：公共英语二级  题型：单选题
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By saying." Stevie soon graduated from toy instruments to re

By saying." Stevie soon graduated from toy instruments to real instruments", the

分类：公共英语二级  题型：单选题
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