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【单选题】
External economies of scale often arise because similar firms
A.
locate in the same geographic region.
B.
collude to fix prices and increase profits.
C.
have excellent internal logistics.
D.
agree to cooperate to expand global trade.
E.
have economies of scale in production.
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参考答案：
举一反三
【单选题】Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local; conditions and resources. Unlike in the Americas, where metallurgy was a very late and limited devel...
A.
¨While American iron makers developed the latest furnaces, African iron makers continued using earlier techniques.
B.
¨Africans produced iron much earlier than Americans, inventing technologically sophisticated heating systems.
C.
¨Iron making developed earlier in Africa than in the Americas because of the ready availability of carbon and iron ore.
D.
¨Both Africa and the Americas developed the capacity for making iron early, but African metallurgy developed at a slower rate.
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【单选题】听力原文： It was a hot afternoon in September 1963. A small party of engineers in a truck were exploring, looking for oil in the southeastern desert of Libya. They were about four hundred miles south of t...
A.
At dawn.
B.
At sunset.
C.
In the middle of the day.
D.
In the afternoon.
查看完整题目与答案
【单选题】A ball of clay falls freely to the hard floor. It does not bounce noticeably, and it very quickly comes to rest. What, then, has happened to the energy the ball had while it was falling?
A.
It has been used up in producing the downward motion.
B.
It has been transformed back into potential energy.
C.
It has been transferred into the ball by heat.
D.
It is in the ball and floor (and walls) as energy of invisible molecular motion.
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【判断题】人口密度属于人口变量
A.
正确
B.
错误
查看完整题目与答案
【多选题】逆变电路的电路结构有( )
A.
单桥式
B.
全桥式
C.
单端式
D.
整流式
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指:
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
E.
蚤休
查看完整题目与答案
【单选题】赵某,男,59岁。因刺激性咳嗽、咳痰,痰中带血1个月入院,胸部CT示“右肺占位性病变”,纤维支气管镜检查示“右肺下叶支气管可见新生物突入管腔,呈菜花状”,病理回报为“高分化鳞癌”,入院诊断“右肺中心型肺癌”,于全麻下行右全肺切除术。术后最主要的护理问题是
A.
气体交换障碍
B.
营养失调:低于机体需要量
C.
疼痛
D.
焦虑与恐惧
E.
肺感染
查看完整题目与答案
【单选题】赵某,男,59岁。因刺激性咳嗽咳痰,痰中带血1个月入院,胸部CT示“右肺占位性病变”,纤维支气管镜检查示“右肺下叶支气管可见新生物突人管腔,呈莱花状”,病理报告为“高分化鳞癌”,人院诊断“右肺中心型肺癌”,于全麻下行右全肺切除术。术后最主要的护理问题是
A.
气体交换障碍
B.
营养失调：低于机体需要量
C.
疼痛
D.
焦虑与恐惧
E.
肺感染
查看完整题目与答案
【单选题】1 汽车大包围的作用是()汽车行驶时所产生的逆向气流。
A.
增加
B.
减少
C.
加大
查看完整题目与答案
【单选题】关于细胞靜息电位的论述，不正确的是（  ）
A.
静息电位与膜两侧Na+-K+泵的活动有关
B.
静息电位主要是由K+内流形成的
C.
细胞膜处于极化状态
D.
细胞在靜息状态时处于外正内负的状态
E.
静息状态下，细胞膜对K+通透性増高
查看完整题目与答案
相关题目：
【单选题】Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local; conditions and resources. Unlike in the Americas, where metallurgy was a very late and limited devel...
A.
¨While American iron makers developed the latest furnaces, African iron makers continued using earlier techniques.
B.
¨Africans produced iron much earlier than Americans, inventing technologically sophisticated heating systems.
C.
¨Iron making developed earlier in Africa than in the Americas because of the ready availability of carbon and iron ore.
D.
¨Both Africa and the Americas developed the capacity for making iron early, but African metallurgy developed at a slower rate.
查看完整题目与答案
【单选题】听力原文： It was a hot afternoon in September 1963. A small party of engineers in a truck were exploring, looking for oil in the southeastern desert of Libya. They were about four hundred miles south of t...
A.
At dawn.
B.
At sunset.
C.
In the middle of the day.
D.
In the afternoon.
查看完整题目与答案
【单选题】A ball of clay falls freely to the hard floor. It does not bounce noticeably, and it very quickly comes to rest. What, then, has happened to the energy the ball had while it was falling?
A.
It has been used up in producing the downward motion.
B.
It has been transformed back into potential energy.
C.
It has been transferred into the ball by heat.
D.
It is in the ball and floor (and walls) as energy of invisible molecular motion.
查看完整题目与答案
【判断题】人口密度属于人口变量
A.
正确
B.
错误
查看完整题目与答案
【多选题】逆变电路的电路结构有( )
A.
单桥式
B.
全桥式
C.
单端式
D.
整流式
查看完整题目与答案
【单选题】功效清热解毒,凉血止痢,尤善于清胃肠湿热及血分热毒,为治热毒血痢的良药是指:
A.
黄连
B.
白头翁
C.
红藤
D.
白花蛇舌草
E.
蚤休
查看完整题目与答案
【单选题】赵某,男,59岁。因刺激性咳嗽、咳痰,痰中带血1个月入院,胸部CT示“右肺占位性病变”,纤维支气管镜检查示“右肺下叶支气管可见新生物突入管腔,呈菜花状”,病理回报为“高分化鳞癌”,入院诊断“右肺中心型肺癌”,于全麻下行右全肺切除术。术后最主要的护理问题是
A.
气体交换障碍
B.
营养失调:低于机体需要量
C.
疼痛
D.
焦虑与恐惧
E.
肺感染
查看完整题目与答案
【单选题】赵某,男,59岁。因刺激性咳嗽咳痰,痰中带血1个月入院,胸部CT示“右肺占位性病变”,纤维支气管镜检查示“右肺下叶支气管可见新生物突人管腔,呈莱花状”,病理报告为“高分化鳞癌”,人院诊断“右肺中心型肺癌”,于全麻下行右全肺切除术。术后最主要的护理问题是
A.
气体交换障碍
B.
营养失调：低于机体需要量
C.
疼痛
D.
焦虑与恐惧
E.
肺感染
查看完整题目与答案
【单选题】1 汽车大包围的作用是()汽车行驶时所产生的逆向气流。
A.
增加
B.
减少
C.
加大
查看完整题目与答案
【单选题】关于细胞靜息电位的论述，不正确的是（  ）
A.
静息电位与膜两侧Na+-K+泵的活动有关
B.
静息电位主要是由K+内流形成的
C.
细胞膜处于极化状态
D.
细胞在靜息状态时处于外正内负的状态
E.
静息状态下，细胞膜对K+通透性増高
查看完整题目与答案
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