第24题: [单项选择]The presence of bubbles in a refrigeration system liquid line may (). A. promote refrigerant dehydration B. be absorbed in the receiver C. cause low condensing pressure D. carry moisture and lead to corrosion 参考答案:D
第28题: [单项选择]男,60岁。鼻咽癌欲行放射治疗。放疗开始前应采取的措施不包括() A. 常规洁治 B. 对口腔内可引起感染的病灶牙进行治疗 C. 对能保留的龋齿进行治疗 D. 无法治愈的病牙予以拔除 E. 缺失牙进行固定义齿修复 参考答案:E 答案解析:在做放疗前还要积极地进行对症治疗,否则,容易继发局部感染,并导致齿槽溢脓、牙龈肿痛、颌下淋巴结炎,甚至继发颌骨骨髓炎,可待放疗结束后行义齿修复。
第29题: [单项选择]
根据各组对话内容,从下面方框里提供的5个选项中选出最佳选项
A: You’ve cooked such a delicious dinner, Mrs. White.B: ( ). A. Sure. What is it B. It’s very nice of you to say so. C. It’s nothing. D. Have a nice trip! E. Certainly. Here you are. 参考答案:B