Icollect all the ___________(datum) on the Internet.
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The children brush their ___________(tooth) after every meal.
We will never lose our ______________(courage) in difficult situation.
There are many newborn ____________(baby) in this hospital this year.
人类结核病最主要的病原菌是:
A. 牛型结核菌
B. 人型结核菌
C. 鼠型结核菌
D. 人型和牛型结核菌
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