#20钢与#45钢比较，#20钢的机械强度（ ），塑性、韧性（ ）。
A. 低、 高
B. 低 、低
C. 高、高
D. 高、低
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锅炉进行再热器超水压试验时，其试验压力为再热器进口压力的（ ）倍
A. 1.25
B. 1.3
C. 1.5
D. 1.75
《建筑法》规定，从事建筑活动的( )，应依法取得相应的执业资格证书，并在执业资格证书许可的范围内从事建筑活动。
A. 勘察设计单位
B. 施工企业
C. 专业技术人员
D. 工程管理人员
对委托人和监理人有约束力的监理合同，其文件构成不包括( )。
A. 监理中标函
B. 工程量清单
C. 监理合同专用条件
D. 合同履行中双方达成的书面协议
"... his capacity to observe was matched only by his ability to describe... " means ______.
A. he was as accomplished an observer as he was a descriptive writer
B. his capacity to observe and his ability to describe were unrivalled
C. he was capable of adapting descriptions to fit his observations
D. his observations and descriptions reflected his own personal ambitions
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