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【单选题】
关于紫外线，下述哪项不正确
A.
能干扰DNA合成
B.
消毒效果与作用时间有关
C.
常用于空气，物品表面消毒
D.
对眼和皮肤有刺激作用
E.
穿透力强
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参考答案：
举一反三
【单选题】避雷器主要是用来限制（）的一种保护设备
A.
短路电流
B.
有功
C.
无功
D.
大气过电压
查看完整题目与答案
【单选题】Dick had to work after class and during his holidays because ______.
A.
his parents told him to make more friends
B.
he wanted to become a rich man
C.
he couldn't go on with his studies without enough money
D.
he had nothing to do at home
查看完整题目与答案
【单选题】关于战略与纳什均衡的理解,下面正确的是
A.
占优战略均衡不一定是纳什均衡
B.
如果一个协议不构成纳什均衡，它就不可能自动实施
C.
纳什均衡是唯一的
D.
纳什均衡一定由占优战略构成
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是 [     ]
A.
CO 2 是气体，SiO 2 是固体
B.
高温下能发生反应Na 2 CO 3 +SiO 2 Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【简答题】During his work on child protection, he often acts as a(n) ________between parents and children, the parents know what they can do and what they cannot do.A. mediator B. transmitter C. speculat...
查看完整题目与答案
【单选题】During his work on child protection, he often acts as a(n)________ between parents and children, making the parents know what they can do and what they cannot do.
A.
receptor
B.
mediator
C.
rooster
D.
welder
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是（　　）
A.
CO 2 是气体，SiO 2 是固体
B.
高温下能发生反应：Na 2 CO 3 +SiO 2 高温 . Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入NaSiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是
A.
H 2 CO 3 比H 2 SiO 3 受热易分解
B.
高温下能发生反应Na 2 CO 3 ＋SiO 2 Na 2 SiO 3 ＋CO 2 ↑
C.
CO 2 能溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【多选题】企业通过技术创新以达到品牌创新的整个过程中的每个阶段,均可能存在( )
A.
技术风险
B.
政策风险
C.
资金风险
D.
市场风险
查看完整题目与答案
【单选题】During his work on child protection, he often acts as a(n) ________ between parents and children, making the parents know what they can do and what they cannot do.
A.
coupon
B.
receptor
C.
mediator
查看完整题目与答案
相关题目：
【单选题】避雷器主要是用来限制（）的一种保护设备
A.
短路电流
B.
有功
C.
无功
D.
大气过电压
查看完整题目与答案
【单选题】Dick had to work after class and during his holidays because ______.
A.
his parents told him to make more friends
B.
he wanted to become a rich man
C.
he couldn't go on with his studies without enough money
D.
he had nothing to do at home
查看完整题目与答案
【单选题】关于战略与纳什均衡的理解,下面正确的是
A.
占优战略均衡不一定是纳什均衡
B.
如果一个协议不构成纳什均衡，它就不可能自动实施
C.
纳什均衡是唯一的
D.
纳什均衡一定由占优战略构成
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是 [     ]
A.
CO 2 是气体，SiO 2 是固体
B.
高温下能发生反应Na 2 CO 3 +SiO 2 Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【简答题】During his work on child protection, he often acts as a(n) ________between parents and children, the parents know what they can do and what they cannot do.A. mediator B. transmitter C. speculat...
查看完整题目与答案
【单选题】During his work on child protection, he often acts as a(n)________ between parents and children, making the parents know what they can do and what they cannot do.
A.
receptor
B.
mediator
C.
rooster
D.
welder
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是（　　）
A.
CO 2 是气体，SiO 2 是固体
B.
高温下能发生反应：Na 2 CO 3 +SiO 2 高温 . Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入NaSiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【单选题】能证明碳酸比硅酸酸性强的实验事实是
A.
H 2 CO 3 比H 2 SiO 3 受热易分解
B.
高温下能发生反应Na 2 CO 3 ＋SiO 2 Na 2 SiO 3 ＋CO 2 ↑
C.
CO 2 能溶于水生成碳酸，而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
查看完整题目与答案
【多选题】企业通过技术创新以达到品牌创新的整个过程中的每个阶段,均可能存在( )
A.
技术风险
B.
政策风险
C.
资金风险
D.
市场风险
查看完整题目与答案
【单选题】During his work on child protection, he often acts as a(n) ________ between parents and children, making the parents know what they can do and what they cannot do.
A.
coupon
B.
receptor
C.
mediator
查看完整题目与答案
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