题目内容

(),there was no hope of her getting the order.

As she was exhausted
B. If she was exhausted
C. Exhausted though she was
D. Now that she was exhausted

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玻璃体与视网膜连接不紧密的区域是()

A. 视盘边缘
B. 黄斑中心凹周围
C. 玻璃体基底部
D. 玻璃体前表面
E. 玻璃体赤道部

肛诊检查时,胎头下降程度为"+1"是指()

A. 胎儿头皮在坐骨棘平面下1cm
B. 胎儿头皮在坐骨结节上1cm
C. 胎儿顶骨在坐骨结节上1cm
D. 胎儿顶骨在坐骨棘平面下1cm
E. 胎儿顶骨在坐骨棘平面上1cm

光源可以是白色光,也可以是()。

声束穿过界面时方向发生改变,称做()

A. 入射角度
B. 折射
C. 正常反射
D. 后散射
E. 衰减

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