Located at the upper end of each______an adrenal gland, an integral part of the endocrine system.

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问题 Located at the upper end of each______an adrenal gland, an integral part of the endocrine system.

选项 A、kidney which is
B、kidney is
C、kidney being
D、kidney

答案B

解析 本题考查语序。分析句子可知,本句为简单句,且倒装,正常语序为:An adrenal gland,an integral part of the endocrine system,is located at the upper end of each kidney.故答案为[B]项。句意:肾上腺位于肾的上端,是内分泌系统不可缺少的一部分。
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