单词：occult blood test
occult blood test的用法和样例：
例句
- An annual fecal occult blood test, or a new ersion called a fecal immunochemical test, to look for blood in the stool.每年一次粪便隐血试验，或者新的粪便免疫化学试验，来检查大便中有无血液。
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英语新闻
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1． What can I do for you？ 你有什么事？ 2．May I help you？ 我能帮你什么忙？ 3．Please take a seat！ Please sit down！ 请坐下． 4．Wait a moment， please． 请等一等． 5．Sorry to have kept you waiting. 对不起让你
英语口语