A. are caused by a large difference in mean temperature in the horizontal B. are located above the tropopause C. only occur in the troposphere D. have a speed in excess of 80 kt
A. refuge chamber B. tefage chamber C. aefuge chamber D. befuge chamber
A. underground rescue base B. undreground tescue base C. undrerguond iescue base D. undergruond wescue base
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