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Insulin is manufactured by specialized cells in the pancreas and released ______ glucose reaches a certain concentration in the
Insulin is manufactured by specialized cells in the pancreas and released ______ glucose reaches a certain concentration in the
admin
2004-12-28
60
问题
Insulin is manufactured by specialized cells in the pancreas and released ______ glucose reaches a certain concentration in the bloodstream.
选项
A、which
B、whenever
C、how
D、during
答案
D
解析
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