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【单选题】
成语 “ 顾此失彼 ” 中的 “ 彼 ” 就是经济学中所指的
A.
机会成本
B.
经济成本
C.
私人成本
D.
社会成本
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】我国谚语中的“螳螂捕蝉，黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中，捕食黄雀并栖息于林中。下列叙述正确的是
A.
鹰的迁入增加了该树林中蝉及其天敌的数量
B.
该生态系统中细菌产生的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入改变了该生态系统能量流动的方向
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【单选题】中国共产党历史上第一个土地法是( )
A.
《井冈山土地法》
B.
《兴国土地法》
C.
《中华人民共和国土地改革法》
D.
《中国土地法大纲》
查看完整题目与答案
【单选题】我国谚语中的“螳螂捕蝉,黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中,捕食黄雀并栖息于林中。下列叙述正确的是
A.
鹰的迁入增加了该树林中蝉及其天敌的数量
B.
该生态系统中细菌产生的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入增加了该生态系统能量流动的方向
查看完整题目与答案
【单选题】'When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I' m not wrong. 'says Viola, a nurse. This s a common reaction(反应) to ...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for what he did
D.
was sad and self-pitying
查看完整题目与答案
【单选题】—I’m sorry, but I didn’t mean out your secret. —But you know, letting out one’s secret means one’s feelings.
A.
to let; to hurt
B.
letting; hurting
C.
to let; hurting
D.
letting; to hurt
查看完整题目与答案
【单选题】听力原文：M: Wow. I slept like a log. For one, I really feel rested and ready to go. W: Hold it a second. How about treating ourselves to breakfast in bed for a change. Q: What can we learn from this dialo...
A.
They had a sound sleep last night.
B.
They had a telephone call, but the line was engaged.
C.
They stayed in bed.
D.
After breakfast, she would go to see a doctor for treatment.
查看完整题目与答案
【单选题】消费者购买X、Y两种商品，假设X商品的价格为5，Y商品的价格为7，边际替代率MRSxy=0.5，消费者为了达到最大效用，他应当（ ）
A.
增加X的购买量，减少Y的购买量
B.
增加Y的购买量，减少X的购买量
C.
增加X的购买量，同时增加Y的购买量
D.
减少X的购买量，同时减少Y的购买量
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【简答题】What is NOT true of the effectiveness of 'sunscreen', according to the last paragraph?
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【单选题】According to the fifth parag,aph，what is the suggested method to control underground fires?
A.
Using remote sensing technique．
B.
Controlling the release of carbon dioxide．
C.
Making the soil heat resistant．
D.
Cutting off the oxygen supply．
查看完整题目与答案
【单选题】'When one of the doctors criticizes me, I get defensive. I feel like a child again, being scolded, and I want to explain that I'm not wrong,' says Viola, a nurse. This is a common reaction to criticis...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for himself
D.
was sad but confident
查看完整题目与答案
相关题目：
【单选题】我国谚语中的“螳螂捕蝉，黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中，捕食黄雀并栖息于林中。下列叙述正确的是
A.
鹰的迁入增加了该树林中蝉及其天敌的数量
B.
该生态系统中细菌产生的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入改变了该生态系统能量流动的方向
查看完整题目与答案
【单选题】中国共产党历史上第一个土地法是( )
A.
《井冈山土地法》
B.
《兴国土地法》
C.
《中华人民共和国土地改革法》
D.
《中国土地法大纲》
查看完整题目与答案
【单选题】我国谚语中的“螳螂捕蝉,黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中,捕食黄雀并栖息于林中。下列叙述正确的是
A.
鹰的迁入增加了该树林中蝉及其天敌的数量
B.
该生态系统中细菌产生的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入增加了该生态系统能量流动的方向
查看完整题目与答案
【单选题】'When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I' m not wrong. 'says Viola, a nurse. This s a common reaction(反应) to ...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for what he did
D.
was sad and self-pitying
查看完整题目与答案
【单选题】—I’m sorry, but I didn’t mean out your secret. —But you know, letting out one’s secret means one’s feelings.
A.
to let; to hurt
B.
letting; hurting
C.
to let; hurting
D.
letting; to hurt
查看完整题目与答案
【单选题】听力原文：M: Wow. I slept like a log. For one, I really feel rested and ready to go. W: Hold it a second. How about treating ourselves to breakfast in bed for a change. Q: What can we learn from this dialo...
A.
They had a sound sleep last night.
B.
They had a telephone call, but the line was engaged.
C.
They stayed in bed.
D.
After breakfast, she would go to see a doctor for treatment.
查看完整题目与答案
【单选题】消费者购买X、Y两种商品，假设X商品的价格为5，Y商品的价格为7，边际替代率MRSxy=0.5，消费者为了达到最大效用，他应当（ ）
A.
增加X的购买量，减少Y的购买量
B.
增加Y的购买量，减少X的购买量
C.
增加X的购买量，同时增加Y的购买量
D.
减少X的购买量，同时减少Y的购买量
查看完整题目与答案
【简答题】What is NOT true of the effectiveness of 'sunscreen', according to the last paragraph?
查看完整题目与答案
【单选题】According to the fifth parag,aph，what is the suggested method to control underground fires?
A.
Using remote sensing technique．
B.
Controlling the release of carbon dioxide．
C.
Making the soil heat resistant．
D.
Cutting off the oxygen supply．
查看完整题目与答案
【单选题】'When one of the doctors criticizes me, I get defensive. I feel like a child again, being scolded, and I want to explain that I'm not wrong,' says Viola, a nurse. This is a common reaction to criticis...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for himself
D.
was sad but confident
查看完整题目与答案