Page 117 - ภาษาอังกฤษสำหรับสายวิทยาการอุตุนิยมวิทยา
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               Select    connectors and combine the fol1owing sentences as shown in the example. Use "it"
               or "they" when appropriate.

               Examples:      The earth revolves around the sun.

                                    The earth rotates around its own axis.

               Say:   the earth revolves around the sun at the same time it around its own axis."
                   a.   (1) The height of the column of mercury in the barometer changes.

                       (2) The weight of the atmosphere changes.

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                   b.   (1) The partially empty container expands and contracts.

                        (2) The container is sensitive to changes in atmospheric pressure.

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                   C.   (1) The earth completes one rotation every 24 hours.

                        (2) Each part of the earth has one day period and one night period every 24 hours.

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                   d.   (1) We only studied about the troposphere and the stratosphere.

                        (2) Most aircraft flights and weather occur in those layers.

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                   e.   (1) The aneroid barometer is checked weekly against a mercurial barometer.

                       (2) The aneroid barometer is less accurate and may need adjustment.

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