题目内容:
Gussaniandhisteamaresurethat__________. A.babiesborninLaPazareonaveragelighterthaninSantaCruz
B.peoplelivingathighaltitudestendtogivebirthtounder-weightbabies
C.thebirthweightofbabiesinSantaCruzisthelovest
D.mothersinLaPazarecommonlyunder-nourished
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答案解析: