从卫生角度考虑,交谈的最佳距离为( ),这样就不至于因交谈而感染上由飞沫传染的疾病。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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