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【单选题】
若函数 在 处可导,且 ,则 在 处
A.
必有拐点
B.
图像为凹
C.
图像为凸
D.
可能有拐点，也可能没有拐点
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举一反三
【单选题】听力原文：Weren't there many people at the seminar? (A) Only half of whom we expected showed up. (B) It really wasn't as informative as I expected. (C) It was about social implications of our current econo...
A.
B.
C.
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【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖下列哪个治疗方案最佳（）。
A.
大量静脉用抗生素
B.
口服大量抗生素
C.
口服补液及治疗上感
D.
静脉滴注葡萄糖
E.
只需给助消化药
查看完整题目与答案
【单选题】听力原文：M: How did your interview go? W: I couldn't feel better about it. M: You weren't nervous, were you? W: Not at all. The interviewer was very friendly. What do we learn from the conversation?
A.
The woman is sick.
B.
The woman is worded about her interview.
C.
The woman is confident.
D.
The woman is feeling better.
查看完整题目与答案
【单选题】2006年是联合国秘书长的换届年，联合国依据《联合国宪章》选举产生新任秘书长。根据《联合国宪章》，对于秘书长的选举程序，下列哪一表述是正确的?(    )
A.
由联合国安理会采取关于程序性事项的投票程序，直接表决选出秘书长
B.
由联合国大会直接选举，大会成员2/3多数通过
C.
由安理会采取实质性事项表决程序推荐秘书长候选人，经联合国大会以简单多数表决通过
D.
由安理会采取程序性事项表决程序推荐秘书长候选人，经联合国大会表决获2/3多数通过
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【单选题】听力原文：M: Weren't you in class Friday either? W: No. I had to take my mother to the airport. She went back to New York. Q: What. do we learn from the conversation? (5)
A.
Both the man and the woman were in class on Friday.
B.
The man was in class Friday but the woman was not.
C.
The woman was in class Friday but the man was not.
D.
Neither the man nor the woman was in class Friday.
查看完整题目与答案
【单选题】听力原文：Weren't we supposed to study at the library? (A) I'd like to check out a book. (B) I studied four hours. (C) Yeah, but something came up so I can't. (27)
A.
B.
C.
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【单选题】心绞痛发作时,首选舌下含服救命药
A.
硝酸甘油
B.
非肠溶阿司匹林
C.
盐酸苯乙双胍
D.
硝苯地平
查看完整题目与答案
【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖下列哪项与该患儿发病无关（）。
A.
小肠绒毛的上皮细胞变性
B.
绒毛变短，脱落
C.
双糖酶活性降低
D.
肠腔内渗透压增加
E.
腺苷酸环化酶及乌苷酸环化酶活性增强
查看完整题目与答案
【判断题】由于知识产权保护的需要,从中国知网下载的学术论文只能浏览不能提取文字。
A.
正确
B.
错误
查看完整题目与答案
【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖最可能诊断是（）。
A.
致病性大肠杆菌肠炎，轻度脱水
B.
空肠弯曲菌肠炎，重度脱水
C.
病毒性肠炎，轻度脱水
D.
金黄色葡萄球菌肠炎
E.
病毒性肠炎，重度脱水
查看完整题目与答案
相关题目：
【单选题】听力原文：Weren't there many people at the seminar? (A) Only half of whom we expected showed up. (B) It really wasn't as informative as I expected. (C) It was about social implications of our current econo...
A.
B.
C.
查看完整题目与答案
【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖下列哪个治疗方案最佳（）。
A.
大量静脉用抗生素
B.
口服大量抗生素
C.
口服补液及治疗上感
D.
静脉滴注葡萄糖
E.
只需给助消化药
查看完整题目与答案
【单选题】听力原文：M: How did your interview go? W: I couldn't feel better about it. M: You weren't nervous, were you? W: Not at all. The interviewer was very friendly. What do we learn from the conversation?
A.
The woman is sick.
B.
The woman is worded about her interview.
C.
The woman is confident.
D.
The woman is feeling better.
查看完整题目与答案
【单选题】2006年是联合国秘书长的换届年，联合国依据《联合国宪章》选举产生新任秘书长。根据《联合国宪章》，对于秘书长的选举程序，下列哪一表述是正确的?(    )
A.
由联合国安理会采取关于程序性事项的投票程序，直接表决选出秘书长
B.
由联合国大会直接选举，大会成员2/3多数通过
C.
由安理会采取实质性事项表决程序推荐秘书长候选人，经联合国大会以简单多数表决通过
D.
由安理会采取程序性事项表决程序推荐秘书长候选人，经联合国大会表决获2/3多数通过
查看完整题目与答案
【单选题】听力原文：M: Weren't you in class Friday either? W: No. I had to take my mother to the airport. She went back to New York. Q: What. do we learn from the conversation? (5)
A.
Both the man and the woman were in class on Friday.
B.
The man was in class Friday but the woman was not.
C.
The woman was in class Friday but the man was not.
D.
Neither the man nor the woman was in class Friday.
查看完整题目与答案
【单选题】听力原文：Weren't we supposed to study at the library? (A) I'd like to check out a book. (B) I studied four hours. (C) Yeah, but something came up so I can't. (27)
A.
B.
C.
查看完整题目与答案
【单选题】心绞痛发作时,首选舌下含服救命药
A.
硝酸甘油
B.
非肠溶阿司匹林
C.
盐酸苯乙双胍
D.
硝苯地平
查看完整题目与答案
【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖下列哪项与该患儿发病无关（）。
A.
小肠绒毛的上皮细胞变性
B.
绒毛变短，脱落
C.
双糖酶活性降低
D.
肠腔内渗透压增加
E.
腺苷酸环化酶及乌苷酸环化酶活性增强
查看完整题目与答案
【判断题】由于知识产权保护的需要,从中国知网下载的学术论文只能浏览不能提取文字。
A.
正确
B.
错误
查看完整题目与答案
【单选题】患儿9个月，呕吐，腹泻2天入院，发病初伴发热，咳嗽，呕吐2～3次／日，腹泻7～8次／日，水样便，大便镜检少量脂肪球，尿量不少，口渴，略见消瘦，入院时体温37℃，双眼窝、前囟稍下凹，皮肤弹性尚好，四肢温暖最可能诊断是（）。
A.
致病性大肠杆菌肠炎，轻度脱水
B.
空肠弯曲菌肠炎，重度脱水
C.
病毒性肠炎，轻度脱水
D.
金黄色葡萄球菌肠炎
E.
病毒性肠炎，重度脱水
查看完整题目与答案