商检证书的主要作用之一是通过对商品实行检验，以确定卖方所交货物的品质、数量、包装是否与合同的规定相符（）
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电信网的软件是指电信网为能很好地完成信息的传递和（）所必需的一整套协9议、标准
Do you know ________？
A. what time does he have lunch
B. what time he has lunch
C. what time will he have lunch
D. what time has he had lunch
Do you know the_______ （第三） Sunday of June is Father's Day？
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