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【单选题】
有抗冻要求的混凝土选用()为最佳。
A.
防水剂和引气剂
B.
早强剂或防冻剂
C.
泵送剂或速凝剂
D.
引气剂或引气减水剂
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参考答案：
举一反三
【单选题】关于混凝土的抗冻标号，下列不正确的是（）
A.
混凝土的抗冻标号，以同时满足抗压强度损失率不超过25%，重量损失率不超过5%时的最大循环次数来表示
B.
抗冻等级F50的混凝土，表示经50冻融循环后，混凝土强度损失率不超过25%，重量损失率不超过5%
C.
混凝土经60冻融循环后，混凝土强度损失率为15%，重量损失率为5%，则判定抗冻等级为F50
D.
混凝土经60冻融循环后，混凝土强度损失率为15%，重量损失率为5%，则判定抗冻等级为F60
【单选题】最佳修复方案是
A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...
A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判) decisions that denied victory to their team. A researcher was appointed to study the performance...
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match
相关题目：
【单选题】关于混凝土的抗冻标号，下列不正确的是（）
A.
混凝土的抗冻标号，以同时满足抗压强度损失率不超过25%，重量损失率不超过5%时的最大循环次数来表示
B.
抗冻等级F50的混凝土，表示经50冻融循环后，混凝土强度损失率不超过25%，重量损失率不超过5%
C.
混凝土经60冻融循环后，混凝土强度损失率为15%，重量损失率为5%，则判定抗冻等级为F50
D.
混凝土经60冻融循环后，混凝土强度损失率为15%，重量损失率为5%，则判定抗冻等级为F60
【单选题】最佳修复方案是
A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...
A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判) decisions that denied victory to their team. A researcher was appointed to study the performance...
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match
参考解析：
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