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【单选题】
以下关于软件产品序列号说法正确的是( )
A.
产品序列号是产品授权的证明，是根据一定的算法（如椭圆算法）等产生的随机数
B.
产品序列号是指用户为了不受限制地使用某个计算机软件的功能，而在软件安装或使用的过程中，按照指定的要求所输入的由字母、数字或其他符号所组成的一组号码
C.
软件如果不能输入正确的产品序列号，虽然可以安装并使用，但各种各样的限制
D.
产品序列号是软件开发商在用户注册的时候根据用户软件所安装的计算机软硬件信息生成唯一的识别码
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举一反三
【多选题】流体在直管内层流流动时的阻力损失与如下哪几项有关
A.
管长
B.
管内径
C.
管子的相对粗糙度
D.
流体的密度和黏度
查看完整题目与答案
【判断题】淋巴滤泡的初始形态是“初始淋巴滤泡”:一个嵌入在富含B细胞的二级淋巴器官中滤泡树突状细胞(FDC)的松散网络。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A 26-year-old man was running across a field when he caught his right foot in a rabbit hole. As he fell, the right foot was violently rotated laterally and overeverted. On attempting to stand, he coul...
A.
This type of fracture dislocation is caused by forced external rotation and overeversion of the foot.
B.
The talus is extennally rotated against the lateral malleolus of the fibula, causing it to fracture.
C.
The torsion effect on the lateral malleolus produces a spiral fracture.
D.
The medial ligament of the ankle joint is strong and never ruptures.
E.
If the talus is forced to move farther laterally and continues to rotate, the posterior inferior margin of the tibia will be sheared off.
查看完整题目与答案
【单选题】Hippolyta says in Act Scene 1 that Four days will quickly steep themselves in night; Four nights will quickly dream away the time;And then the moon, like to a silver bow New bent in heaven, shall beho...
A.
a  lady.
B.
a silver bow
C.
a man
D.
a rabbit.
查看完整题目与答案
【单选题】在颈部切断双侧交感神经动物会出现:( )
A.
呼吸深快
B.
呼吸深慢
C.
呼吸停止
D.
呼吸慢浅
E.
呼吸活动无明显变化
查看完整题目与答案
【单选题】If the bilateral cervical vagus nerves were cut in rabbit, the respiration will become
A.
deep and slow.
B.
shallow and fast.
C.
shallow and slow.
D.
deep and fast.
E.
no change.
查看完整题目与答案
【单选题】流体在直管内层流流动时的阻力损失与如下几项无关（ ）①管长；②管内径；③管子的相对粗糙度；④流体的密度和黏度
A.
0
B.
1
C.
2
D.
3
查看完整题目与答案
【单选题】If the bilateral cervical vagus nerves were cut in rabbit, the respiration will become
A.
shallow and fast.
B.
shallow and slow.
C.
deep and fast.
D.
deep and slow.
E.
no change.
查看完整题目与答案
【单选题】流体在直管内层流流动时的阻力损失与如下几项无关( ) 1管长; 2管内径; 3管子的相对粗糙度; 4流体的密度和黏度
A.
0
B.
1
C.
2
D.
3
查看完整题目与答案
【单选题】磨损规律中的磨合期对机械设备维修保养的要求应是______。
A.
单位时间内进行有效的磨合
B.
加强冷却
C.
加强润滑，防止黏着磨损
D.
实施视情维修
查看完整题目与答案
相关题目：
【多选题】流体在直管内层流流动时的阻力损失与如下哪几项有关
A.
管长
B.
管内径
C.
管子的相对粗糙度
D.
流体的密度和黏度
查看完整题目与答案
【判断题】淋巴滤泡的初始形态是“初始淋巴滤泡”:一个嵌入在富含B细胞的二级淋巴器官中滤泡树突状细胞(FDC)的松散网络。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A 26-year-old man was running across a field when he caught his right foot in a rabbit hole. As he fell, the right foot was violently rotated laterally and overeverted. On attempting to stand, he coul...
A.
This type of fracture dislocation is caused by forced external rotation and overeversion of the foot.
B.
The talus is extennally rotated against the lateral malleolus of the fibula, causing it to fracture.
C.
The torsion effect on the lateral malleolus produces a spiral fracture.
D.
The medial ligament of the ankle joint is strong and never ruptures.
E.
If the talus is forced to move farther laterally and continues to rotate, the posterior inferior margin of the tibia will be sheared off.
查看完整题目与答案
【单选题】Hippolyta says in Act Scene 1 that Four days will quickly steep themselves in night; Four nights will quickly dream away the time;And then the moon, like to a silver bow New bent in heaven, shall beho...
A.
a  lady.
B.
a silver bow
C.
a man
D.
a rabbit.
查看完整题目与答案
【单选题】在颈部切断双侧交感神经动物会出现:( )
A.
呼吸深快
B.
呼吸深慢
C.
呼吸停止
D.
呼吸慢浅
E.
呼吸活动无明显变化
查看完整题目与答案
【单选题】If the bilateral cervical vagus nerves were cut in rabbit, the respiration will become
A.
deep and slow.
B.
shallow and fast.
C.
shallow and slow.
D.
deep and fast.
E.
no change.
查看完整题目与答案
【单选题】流体在直管内层流流动时的阻力损失与如下几项无关（ ）①管长；②管内径；③管子的相对粗糙度；④流体的密度和黏度
A.
0
B.
1
C.
2
D.
3
查看完整题目与答案
【单选题】If the bilateral cervical vagus nerves were cut in rabbit, the respiration will become
A.
shallow and fast.
B.
shallow and slow.
C.
deep and fast.
D.
deep and slow.
E.
no change.
查看完整题目与答案
【单选题】流体在直管内层流流动时的阻力损失与如下几项无关( ) 1管长; 2管内径; 3管子的相对粗糙度; 4流体的密度和黏度
A.
0
B.
1
C.
2
D.
3
查看完整题目与答案
【单选题】磨损规律中的磨合期对机械设备维修保养的要求应是______。
A.
单位时间内进行有效的磨合
B.
加强冷却
C.
加强润滑，防止黏着磨损
D.
实施视情维修
查看完整题目与答案