【单选题】下列哪项不是均匀流的特征()。
A.
各过水断面均为平面,并且形状和尺寸沿流程不变
B.
各过水断面上流速分布均相同,断面平均流速也相等
C.
均匀流过水断面上的动水压强分布规律与静水压强分布规律相同,即同一过水断面上各点的测压管水头为一常数
【简答题】What conclusion did the writer draw from the example of his student?
【单选题】下列有关验收的描述中,不正确的是( )。
B.
布线系统性能检测验收合格,则布线系统验收合格
D.
综合布线系统工程的验收是多方人员对工程质量和投资的认
【简答题】What conclusion did the writer draw from the example of his student?
【单选题】What conclusion did the author draw after the eight-month car-free life?
A.
He is better off without a car.
B.
He needs to buy a new car.
C.
Life without a car is a little bit hard.
D.
A car-free life does not suit everyone.
【单选题】What conclusion did the man draw after examining himself?
A.
It was because he was too excited by his findings that his heart beat fast.
B.
He was terminally ill and his heart was going to stop beating.
C.
There was enough evidence that he suffered from scarlet fever.
D.
He should shut his eyes and ignore all the bad news he brought on himself.
【判断题】均匀流同一过水断面上不同点的测压管水头并不相同。 ( )
【单选题】下列有关验收的描述中,不正确的是()。
B.
布线系统性能检测验收合格,则布线系统验收合格
D.
综合布线系统工程的验收是多方人员对工程质量和投资的认证