题目内容

静压力桩选用压桩设备的设计承载力宜大于压桩阻力的（）。

A. 40%
B. 30%
C. 20%

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流沙，高水位类基坑的开挖一般采用水泥防护圈配合开挖。

A. 正确
B. 错误

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当资料不足时，贮水池的调节水量可按最高日用水量的（）估算。

A. 1%～5%
B. 5%～10%
C. 10%～20%
D. 20%～30%

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View the Exhibit and examine the output of the query in different times when the following command runs in an RMAN sessions: RMAN> BACKUP DATABASE FILESPERSET 2; The database has seven data files. Why is the %_COMPLETE refreshed to 13.59 in the third output after reaching 88.77?（）

A. Because the progress is reported for each data file
Because the progress is reported for each backup set
C. Because other RMAN sessions have issued the same BACKUP command
D. Because new data files have been added to the database while the RMAN backup is in progre

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被称为杂交水稻之父的是谁？

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静压力桩选用压桩设备的设计承载力宜大于压桩阻力的（）。

A. 40% B. 30% C. 20%

流沙，高水位类基坑的开挖一般采用水泥防护圈配合开挖。

当资料不足时，贮水池的调节水量可按最高日用水量的（）估算。

View the Exhibit and examine the output of the query in different times when the following command runs in an RMAN sessions: RMAN> BACKUP DATABASE FILESPERSET 2; The database has seven data files. Why is the %_COMPLETE refreshed to 13.59 in the third output after reaching 88.77?（）

被称为杂交水稻之父的是谁？

A. 40%
B. 30%
C. 20%