Do you know how to wear a mask correctly?
Firstly, . Child size is available for selection
Secondly, .
Next, . The colored side of the mask face outwards with the metallic strip(金属条) uppermost. For those masks without a colored side, the side with folds facing downwards on the outside. For tie-on surgical mask, secure upper tie at the crown of head. Then secure lower tie at the nape. For ear-loops type, position the elastic bands around both ears. Mould the metallic strip over nose bridge. Extend the mask to fully cover mouth, nose and chin.
At last, . Otherwise, you should wash hands before and after touching the mask.
| A. choose the appropriate mask size B. wash hands before putting on a mask C. avoid touching the mask after wearing D. the mask should fit snugly over (紧贴) the face |
How many types of mask are mentioned according to paragraph three?
A. One. B. Two. C. Three. D. Four.
