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【单选题】
一肿瘤后援所在深度为4CM，问选用合适的放疗的电子束能量为（）。A.
8MeV–10MeV
B.
10MeV–12MeV
C.
14MeV–15MeV
D.
16MeV–17MeV
E.
18MeV–19MeV
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better than
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【单选题】Mark Bryson is talking to his students about global warming. Listen to what he tells them and choose the correct statements.
A.
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B.
Stormier storms are caused by the rising sea.
C.
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D.
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