须先用地塞米松及组胺H1和H2受体阻断药预防过敏反应的药物是
A．阿霉素
B．放线菌素D
C．环磷酰胺
D．丝裂霉素
E．紫杉醇
参考答案：E
解析： 本题考查抗恶性肿瘤药物的临床作用。
放线菌素D抗瘤谱较窄，主要用于恶性葡萄胎和绒毛膜上皮癌的治疗，对淋巴瘤、胚胎性肿瘤、肾母体细胞瘤也有一定治疗效果，另外对放疗有增敏作用，宜于合用。故69题选B。阿霉素丝裂霉素临床抗肿瘤谱广，疗效高，可用于多种联合治疗，常用于各种实体瘤的治疗，故70题可选A或D。环磷酰胺抗菌谱广，对恶性淋巴瘤疗效显著，对多发性骨髓瘤、急性淋巴细胞性白血病、儿童神经母细胞瘤疗效好。也可作为免疫免疫抑制剂用于某些自身免疫性疾病及抗器官移植排斥反应。紫杉醇难溶于水，注射剂中要加大量聚氧乙基蓖麻油助溶，从而引起过敏反应，可先用地塞米松及组胺H1和H2受体阻断药预防过敏反应。
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| We all hear about a kind of feeling called ESP (超感官知觉). And we know a great many stories about it. Here I want to ask you, "Have you ever 1 felt that someone you know was in trouble-and 2 ? Have you ever dreamed of something that came true later?" Maybe you have ESP. ESP 3 Extra Sensory Perception. It may be called a sixth sense. It seems to let people know about events 4 they happen, or events that are happening some distance away. Here is a(n) 5 : A woman was doing washing. Suddenly she 6 , "My father is dead!I saw him 7 in the chair!" Just then, a telegram came. The woman's father had 8 of a heart attack. He died sitting in a chair. There are thousands of stories like this 9 record. Scientists are studying them to find out 10 is behind these strange mental 11 . Here's another example-one of hundreds of dreams that have come true. A man dreamed he was walking along a road 12 a carriage came by. The driver said, "There's room for one more." The man felt the driver was 13 , so he ran away. The next day the man was getting on a crowded bus. This bus driver 14 . "There's room for one more." Then the man saw the driver's face was the same face he had 15 in the dream. He 16 get on the bus. As the bus drove off, it crashed and 17 flames. Everyone was killed! 18 people say stories like these are lies or coincidences. Others,including some scientists say the ESP is 19 from studies of ESP, we may some day learn 20 about the human mind. | ||||
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