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【单选题】
在十二指肠溃疡病人和，对照组中进行血型分布的大样本调查，血型分为O、A 、B、AB型，为比较病例组和对照组之间的血型分布的差异，需采用
A.
u检验
B.
t检验
C.
配对的t检验
D.
X2检验
E.
以上都不是
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举一反三
【单选题】No.14
A.
She is over the speed limit.
B.
She is on the wrong way.
C.
She is a phone call.
D.
She is smoking while driving.
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【判断题】效婚姻与可撤销婚姻都是一经确认,自始无效。
A.
正确
B.
错误
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【单选题】硫酸奎宁分子结构中碱性较强的是:
A.
黄嘌呤环
B.
吲哚环
C.
喹啉环
D.
喹核碱
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【单选题】NO.14
A.
chances
B.
responses
C.
missions
D.
benefits
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【单选题】Which of the following policies is NOT included in the British foreign trade policies?
A.
Generally, it has been adopting free trade policy.
B.
There are 7 free trade zones, where the government allows goods to be stored for shipment without tariffs or import duties.
C.
The government tends to have free trade policies for competitive enterprises in the UK.
D.
The government tends to have protective trade policies for foreign-market-oriented enterprises in the UK.
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【单选题】The main difference between cancelable insurance policies and non-cancelable policies is______.
A.
the cost
B.
limitations
C.
valid term
D.
policyholder's age
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【判断题】离心式通风机与水泵的工作原理相似( )。
A.
正确
B.
错误
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【判断题】无效婚姻与可撤销婚姻都是一经确认,自始无效。
A.
正确
B.
错误
查看完整题目与答案
【单选题】No.14
A.
Good.
B.
Difficult.
C.
Challenging.
D.
Boring.
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【单选题】What is the difference between command-and-control policies and market-based policies toward externalities?
A.
a.    Command-and-control policies provide incentives for private decision makers to solve the problems on their own, whereas market-based policies regulate behavior directly.
B.
b.   Command-and-control policies rely on taxes, whereas market-based policies rely on quotas.
C.
c.    Command-and-control policies regulate behavior directly, whereas market-based policies provide incentives for private decision makers to change their behavior.
D.
d.   Command-and-control policies are efficient, whereas market-based policies are inefficient.
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相关题目：
【单选题】No.14
A.
She is over the speed limit.
B.
She is on the wrong way.
C.
She is a phone call.
D.
She is smoking while driving.
查看完整题目与答案
【判断题】效婚姻与可撤销婚姻都是一经确认,自始无效。
A.
正确
B.
错误
查看完整题目与答案
【单选题】硫酸奎宁分子结构中碱性较强的是:
A.
黄嘌呤环
B.
吲哚环
C.
喹啉环
D.
喹核碱
查看完整题目与答案
【单选题】NO.14
A.
chances
B.
responses
C.
missions
D.
benefits
查看完整题目与答案
【单选题】Which of the following policies is NOT included in the British foreign trade policies?
A.
Generally, it has been adopting free trade policy.
B.
There are 7 free trade zones, where the government allows goods to be stored for shipment without tariffs or import duties.
C.
The government tends to have free trade policies for competitive enterprises in the UK.
D.
The government tends to have protective trade policies for foreign-market-oriented enterprises in the UK.
查看完整题目与答案
【单选题】The main difference between cancelable insurance policies and non-cancelable policies is______.
A.
the cost
B.
limitations
C.
valid term
D.
policyholder's age
查看完整题目与答案
【判断题】离心式通风机与水泵的工作原理相似( )。
A.
正确
B.
错误
查看完整题目与答案
【判断题】无效婚姻与可撤销婚姻都是一经确认,自始无效。
A.
正确
B.
错误
查看完整题目与答案
【单选题】No.14
A.
Good.
B.
Difficult.
C.
Challenging.
D.
Boring.
查看完整题目与答案
【单选题】What is the difference between command-and-control policies and market-based policies toward externalities?
A.
a.    Command-and-control policies provide incentives for private decision makers to solve the problems on their own, whereas market-based policies regulate behavior directly.
B.
b.   Command-and-control policies rely on taxes, whereas market-based policies rely on quotas.
C.
c.    Command-and-control policies regulate behavior directly, whereas market-based policies provide incentives for private decision makers to change their behavior.
D.
d.   Command-and-control policies are efficient, whereas market-based policies are inefficient.
查看完整题目与答案