悬沙测验仪器工具源误差评估时,一般将精度高、()好的仪具获得的成果作为标准Bi,常规仪器的相应成果作为观测值Gi。
A.材料
B.效率
C.自动化
D.性能
参考答案:D
膨胀性
Stella was disappointed to find her new plan _____ and fell into great depression.[ ]
A. set down
B. turned down
C. calmed down
D. written down