作为人的仪表之首，也是最为动人之处，所以（）的修饰是仪容美的焦点，在社交中其修饰显得尤为重要。
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Oh, You're back at work? How was your holiday? （）
A. We had rain every day and stayed at the hotel most of the time.
B. The ten-day holiday was not long enough.
C. I was missing you when I was on holiday.
D. I heard you were on holiday, too.
六大常用水泥的初凝时间均不得短于60min。
A. 正确
B. 错误
正确使用质量合格的安全套可以减少感染性病和艾滋病病毒的危险。
A. 正确
B. 错误
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