请写出下列句中划线部分相应的正确缩写形式。Under “time” for next week’s meeting, someone had written “to be announced.”
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请写出下列句中划线部分相应的正确缩写形式。Dr. Jiang spoke about the human immunodeficiency virus.
请写出下列句中划线部分相应的正确缩写形式。All books have an International Standard Book Number.
请写出下列句中划线部分相应的正确缩写形式。The National 4-H headquarters is in Washington.
请写出下列句中划线部分相应的正确缩写形式。Find the universal product code on this digital video disc.