How many years did it take to complete the connection of recordings？
A. 26 years.
B. 33 years.
C. 44 years.
D. 57 years.
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可根据标准编制无损检测工艺，审核或签发检测报告，解释检测结果，仲裁Ⅱ级人员对检测结论的技术争议的是()无损检测人员。
A. Ⅰ级(初级)
B. Ⅱ级(中级)
C. Ⅲ级(高级)
D. 特级
What do the storyteller tell us about？
A. How they were brought to the United States from Africa.
B. The release of the collection of recordings.
C. What happened 60 years after their emancipation？
D. Their experiences as slates and their lives as free men and women.
机械设备安装的一般施工程序中，设备固定应在()之后进行。
A. 设备就位
B. 精度检测与调整
C. 设备基础验收
D. 设备调整与试运转
在起重工程中，钢丝绳一般用来做缆风绳、滑轮组跑绳和吊索，其中做滑轮组跑绳的安全系数一般不小于()。
A. 3.5
B. 5
C. 6.5
D. 8
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