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The danger associated with using carbon dioxide in an enclosed space is（）.

A.frostbite
B.skin burns
C.asphyxiation
D.an explosive reaction

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The Agreement sha1l commence（）a satisfactory Medical Report by a doctor nominated by the Company.

A.on the part of
B.in lieu of
C.subject to
D.in accordance with

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Symptoms of sugar diabetes include（）.

A.increased appetite and thirst
B.decreased appetite and thirst
C.gain in weight
D.elevated temperature

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