问题
单项选择题 A2型题
某医师研究腹腔镜胆囊手术疗效时，实验组用腹腔镜胆囊手术疗法，对照组用传统胆囊手术疗法，其对照形式为（）
A.实验对照
B.空白对照
C.安慰剂对照
D.标准对照
E.历史对照
答案
参考答案：D
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某医师研究腹腔镜胆囊手术疗效时，实验组用腹腔镜胆囊手术疗法，对照组用传统胆囊手术疗法，其对照形式为（）
A.实验对照
B.空白对照
C.安慰剂对照
D.标准对照
E.历史对照
参考答案：D
| 完形填空。 People often go to the seaside for their holidays. And the towns by the sea are always trying to 1 more visitors in their own way. In one seaside holiday __2 _ in the south of England, plans were made for a band to play 3 in a public park every evening for a week. But it rained 4 on the first evening. 5 the band played well, there was only one person in the auditorium. The band was 6 some cover, but the audience was not. The man was sitting in a chair, _ 7 . a raincoat. After an hour, the conductor of the band went over to the man and 8 if he had a special request (要求). "Yes, I do," said the man. "Please finish as soon as you 9 . I'm the keeper of the park and I want to 10 the gate and go home. " | ||||
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