The ozone layer is located in ( ) A: stratosphere B: mesosphere C: thermsphere D: troposphere

The ozone layer is located in the _______________. A: troposphere B: stratosphere C: mesosphere D: thermophere

地球大气平流层(Stratosphere)里，最主要的气体成分是（______）。

The main weather phenomena appear in . A: stratosphere B: troposphere C: mesosphere D: thermosphere

Most of the water vapor in the atmosphere is contained in which layer of the atmosphere A: Troposphere B: Tropopause C: Stratosphere

The ozone layer is located in which layer of the atmosphere? A: trophsphere B: stratosphere C: mesosphere D: thermosphere E: exosphere

Paragraph 4. ______. A: The Definition and The Description of The Ions B: The Definition And The Description of The Stratosphere C: The Sun’s Rays D: Recent Studies of The Upper Atmosphere Versus Past Studies E: The Definition And The Description of The Troposphere F: The Composition of The Atmosphere