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| 1. |
The mucus produced by the goblet cells (a) moistens the incoming air (b) trap the fine dust particles (c) filter out large dust particles (d) warms the incoming air .A. (I) a, b , c are correctB. (2) only a is correctC. (3) b and d are correctD. (4) a and c are incorrect |
| Answer» Correct Answer - A | |