During the novel coronavirus (新型冠状病毒) the distinction (区别) between a mask (口罩) and N95 mask is ________.
| A．unnecessary | B．worthless | C．important | D．uninteresting |
更新时间：2020/08/19 15:32:57
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【推荐2】I’m afraid this painting is not by Picasso.It’s only a copy and so it’s ______．
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