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【单选题】
水泥混凝土配合比设计步骤分为: 1 初步配合比设计阶段:该阶段是针对设计要求,根据原材料具有的性能,采用经验的方法提出初步配合比; 2 基准配合比阶段:该阶段通过实际拌和实际测定的方法,提出满足工作性要求的配合比; 3 试验室配合比设计阶段:该阶段采用增加获减少用水量,通过改变混凝土水灰比的方法,确定满足强度要求的配合比; 4 工地配合比设计阶段:该阶段根据现场砂、石含水率,调整施工过程中所有材料的用量,提出工地实际所需的配合比。上述叙述中完全对的内容是( )
A.
①、②
B.
③、④
C.
①、④
D.
②、③
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参考答案：
举一反三
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/Muy
D.
MUx/MUy=Px/Py
查看完整题目与答案
【单选题】Which area of academic study is not mentioned by the speaker when he talks about scientific advances in 17th century Britain?
A.
Biology.
B.
Chemistry.
C.
Medicine.
D.
Astrology.
查看完整题目与答案
【单选题】It can be inferred that the author holds a positive attitude towards______.
A.
top scientific journals
B.
filter then publish mechanism
C.
studies from star scientists
D.
open-access megajournals
查看完整题目与答案
【单选题】For some time now, Chinese people, under the leadership of CPC, ______ the contents of the Scientific Development Theory in the course of practicing socialism in China.
A.
had been improving
B.
have been improving
C.
were improving
D.
improved
查看完整题目与答案
【单选题】Why do those promoters think the tanning machines are healthy?
A.
Because they are scientifically designed.
B.
Because they have high quality control.
C.
Because they can emit those harmful rays.
D.
Because they are comfortable.
查看完整题目与答案
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/MUy
D.
MUx/MUy=Px/Py
查看完整题目与答案
【单选题】听力原文：Meditation is being recommended by more and more physicians as a way to prevent, slow or at least control the pain of chronic diseases like heart conditions, AIDS, cancer, and infertility. It is ...
A.
It relieves the pain of cancer.
B.
It counteracts the effect of depression.
C.
It has mystic elements.
D.
It has long been used as a cure-all.
查看完整题目与答案
【多选题】假设w某消费者只购买两种商品X和Y,当满足( )时,消费者均衡能够实现。
A.
MRSxy =Px/Py
B.
MRSxy =MUx/MUy
C.
MUx/Px =MUy/Py
D.
无差异曲线与预算线相切
查看完整题目与答案
【单选题】1对岗位进行价值排序,评估岗位重要性,确定岗位职能等级是()。
A.
职务说明
B.
任职资格说明
C.
职务价值评价
D.
职务规划
查看完整题目与答案
【多选题】下列属于大学生求职择业中常见的心理问题有
A.
从众心理
B.
攀比心理
C.
自负心理
D.
依赖心理
查看完整题目与答案
相关题目：
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/Muy
D.
MUx/MUy=Px/Py
查看完整题目与答案
【单选题】Which area of academic study is not mentioned by the speaker when he talks about scientific advances in 17th century Britain?
A.
Biology.
B.
Chemistry.
C.
Medicine.
D.
Astrology.
查看完整题目与答案
【单选题】It can be inferred that the author holds a positive attitude towards______.
A.
top scientific journals
B.
filter then publish mechanism
C.
studies from star scientists
D.
open-access megajournals
查看完整题目与答案
【单选题】For some time now, Chinese people, under the leadership of CPC, ______ the contents of the Scientific Development Theory in the course of practicing socialism in China.
A.
had been improving
B.
have been improving
C.
were improving
D.
improved
查看完整题目与答案
【单选题】Why do those promoters think the tanning machines are healthy?
A.
Because they are scientifically designed.
B.
Because they have high quality control.
C.
Because they can emit those harmful rays.
D.
Because they are comfortable.
查看完整题目与答案
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/MUy
D.
MUx/MUy=Px/Py
查看完整题目与答案
【单选题】听力原文：Meditation is being recommended by more and more physicians as a way to prevent, slow or at least control the pain of chronic diseases like heart conditions, AIDS, cancer, and infertility. It is ...
A.
It relieves the pain of cancer.
B.
It counteracts the effect of depression.
C.
It has mystic elements.
D.
It has long been used as a cure-all.
查看完整题目与答案
【多选题】假设w某消费者只购买两种商品X和Y,当满足( )时,消费者均衡能够实现。
A.
MRSxy =Px/Py
B.
MRSxy =MUx/MUy
C.
MUx/Px =MUy/Py
D.
无差异曲线与预算线相切
查看完整题目与答案
【单选题】1对岗位进行价值排序,评估岗位重要性,确定岗位职能等级是()。
A.
职务说明
B.
任职资格说明
C.
职务价值评价
D.
职务规划
查看完整题目与答案
【多选题】下列属于大学生求职择业中常见的心理问题有
A.
从众心理
B.
攀比心理
C.
自负心理
D.
依赖心理
查看完整题目与答案
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