题目:
The Tibetans have lived in the Himalayas for centuries and have adjusted to the conditions _______.[ ]
A. at such great height
B. at such a great height
C. on such great height
D. on such a great height
答案:
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参考答案:A解析:[解题思路] 患者有停经史,且有不规则 * * 流血及下腹痛,为异位妊娠的典型表现。吸宫术后病理报告仅见蜕膜耒见绒毛可有助手诊断异位妊娠,排除宫内妊-娠。