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搜题
【单选题】
下列物质一定属于纯净物的是
A.
从空气中分离出来的稀有气体
B.
矿泉水
C.
加热高锰酸钾完全反应后的剩余物
D.
部分结冰的蒸馏水
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【单选题】No.14
A.
She is over the speed limit.
B.
She is on the wrong way.
C.
She is making a phone call.
D.
She is smoking while driving.
【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
【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
【简答题】No.14
【单选题】砖砌平拱过梁的灰缝应砌成楔形缝。拱脚下面应伸入墙内不小于20 mm,拱底应有( )起拱。
A.
1%
B.
2%
C.
3%
D.
5%
【单选题】No.14
A.
Review the detail of all her lessons.
B.
Compare notes with his classmates.
C.
Talk with her about his learning problems.
D.
Focus in the main points of her lectures.
【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
【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
【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
【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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