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第1题

We are _______ at the rapid progress Mark has made in this semester. 　A) distinguished B) annoyed C) aston
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第2题

鸡蛋的外部品质主要包括 () 蛋的比重 蛋壳厚度 蛋壳强度 蛋壳色泽
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第3题

When a spacecraft travels, one of the major problems is reentry into the Earth’s _______. 　A) surface B) atmo
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第4题

People appreciate ____ with him because he has a good sense of humor. A) to work B) to have worked C) working D) havin
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