第23题: [单项选择]______ there were so many options, everyone was satisfied. A. (A) If B. (B) Why C. (C) Because D. (D) When 参考答案:C 答案解析:Because is a subordinate conjunction showing cause and effect with an expected result. Choice (A) is
第30题: [单项选择]逆行肾盂造影示自肾小盏中央开始向皮质呈放射状或肩状阴影,属于() A. 肾盂静脉周围逆流 B. 肾盂肾窦逆流 C. 肾盂淋巴管逆流 D. 肾盂静脉逆流 E. 肾小管逆流 参考答案:E 答案解析:肾小管逆流,对比剂在肾盂肾盏进入乳头小管并向收集系统扩散,表现为肾小盏中央开始向皮质呈放射状或肩状阴影。