第9题: [单项选择]According to the passage, the experience of helplessness causes rats to ________. A. try to control unpleasant stimuli B. turn off the electricity C. behave passively in controllable situations D. become abnormally suspicious 参考答案:C
第16题: [单项选择]Mrs. Swan has cooked a special meal________her important visitors. A. in favor of B. in honor of C. in regard of D. in terms of 参考答案:B 答案解析:Swan太太做了一道特殊的菜向她的来客表示敬意。in favor of意为“赞成，支持”；in honor of“为了表示对... ...的尊敬、敬意”；in regard of不是固定短语；in t
第23题: [单项选择]下列关于局麻药不良反应的描述，错误的是（） A. 局麻药的不良反应分为局部性和全身性两种类型 B. 若神经或神经束内局麻药浓度过高，可以损害神经组织 C. 应用小剂量局麻药即出现毒性反应，应考虑为高敏反应 D. 变态反应是常见的局麻药不良反应 E. 发生局麻药毒性反应是因为单位时间内血液中局麻药的浓度超过机体的耐受能力 参考答案:D 答案解析:经常误把局麻药引起的某些反应归咎于"局麻药过敏"，是不正确的。变态反应发生率只占局麻药不良反应的2%，真正的变态反应是罕见的。在临床上必须把变态反应、毒性反应及血管收缩药物反应加以区别。酯类局麻药引起
第28题: [简答题]学生的职责(The Duties of Students) 参考答案:
[参考范文] The Duties of Students We students are the future constructors of our country. The first thing we ought to know is what is the best way to serve our country. Therefore we should work hard while we are in school. As a student, we must take notice of the teacher’ s lectures. Our teacher’ s knowledge and experience are better than ours. We should strictly obey our teachers and pay close attention to their lectures, Books are good friends of students and rich source of knowledge. If we study diligently and attentively we are on the road to success. Only by arming ourselves with rich knowledge can we be good constructors of our country.
