Which three statements are true about persistent configuration？（）
A user cannot set privileges on the persistent lightweight jobs
B. Persistent lightweight jobs generate a large amount of metadata
C. It is possible to create fully self-contained persistent lightweight jobs
D. The use of a template is mandatory to create persistent lightweight jobs
E. Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time
为了使砂浆具有良好的和易性及其他施工性能，可在砂浆中掺入某些（）
A. 胶凝材料
B. 细骨料
C. 外加剂
D. 掺加料
同向捻钢丝绳可以在无导向装置情况下使用。提升多选用同向捻绳。（）
A. 正确
B. 错误
标识的中心太阳初升，光芒四射，象征着中国石油朝气蓬勃，前程似锦。
A. 正确
B. 错误
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