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【简答题】
已知一对正确安装的标准渐开线正常齿制齿轮的ɑ=20 0 ,测得其中心距为180mm.两齿轮的齿数分别为Z1=24,Z2=48,。试求两齿轮的模数和小齿轮的分度圆半径、齿顶圆半径、齿根圆半径。
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举一反三
【单选题】姚女士,肾盂输尿管恶性肿瘤, PICC置管后第二天,PICC穿刺点无出血, 病人 无不适主诉。护士应何时给予 PICC维护
A.
置管 24小时后
B.
每 7天维护一次
C.
每周更换 2次
D.
敷料有松动，潮湿
E.
有出血时
【简答题】It ( ) that the outcome of this discussion would be a new pay settlement.
【多选题】The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema.Which two statements are true regarding the outcome of this action?（）
A.
All the related indexes and views are automatically dropped
B.
The flashback drop feature can recover only the table structure
C.
Only the related indexes are dropped whereas views are invalidated
D.
The flashback drop feature can recover both the table structure and its data
【单选题】The INV_HISTORY table is created using the command: You would like to store the data belonging to the year 2006 in a single partition and issue the command: What would be the outcome of this command? ...
A.
It executes successfully, and the transition point is set to '1-apr-2006'.
B.
It executes successfully, and the transition point is set to '15-apr-2006'.
C.
It produces an error because the partitions specified for merging are not adjacent.
D.
It produces an error because the date values specified in the merge do not match the date values stored in the table.
【单选题】22
A.
Cut down production cost.
B.
Sell inexpensive products.
C.
Specialise in gold ornaments 10 .
D.
Refine the taste of his goods.
【单选题】姚女士,肾盂输尿管恶性肿瘤, PICC置管后第二天,PICC穿刺点无出血,患者无不适主诉。护士应何时给予PICC维护。
A.
置管 24小时后
B.
每 7天维护一次
C.
每周更换 2次
D.
敷料有松动，潮湿时
E.
有出血时
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