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问答题
A.The man can only see the doctor two weeks later.
B.Appointments must be made two weeks in advance.
C.The man can have an appointment with the doctor on Friday.
D.The doctor has cancelled his appointments on Friday.
A.The
B.
B.Appointments
C.
C.The
D.
D.The
E.
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单项选择题
函数
的连续区间为( )。
A.(-∞,+∞) B.(-∞,1)∪(1,+∞)
C.(-∞,1) D.(1,+∞)
A.174.24.96:6088/Latex/latex.action?latex=Zih4KT1cbGVmdFx7XGJlZ2lue2FycmF5fXtjY31cZnJhY3t4XnsyfS14fXt4LTF9LCZ44omgMVxc%0D%0AXGZyYWN7MX17Mn0sJng9MVxlbmR7YXJyYXl9'
B.(-∞,+∞)
C.(-∞,1)∪(1,+∞)
D.(-∞,1)
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问答题
某水库大坝为混凝土拱坝,总库容为0.6×10
8
m
3
,正常蓄水位为665.00m,设计洪水位为666.20m,相应下游水位为615.00m,校核洪水位为666.80m,相应下游水位为615.85m,拱坝上游河床高程为604.00m,泄流和消能方式采用坝顶自由溢流和跌流消能方式,设计洪水位泄流量为2498m
3
/s,校核洪水位泄流量为2701m
3
/s,共3孔,每净孔宽(出口净宽)为11.00m,堰顶高程为655.00m,鼻坎高程为652.00m,下游阿床底高程为605.50m,最大挑距和最大冲坑深度( )。
A.L
d
=49.35m、t
d
=5.02m B.L
d
=51.47m、t
d
=5.36m
C.L
d
=49.35m、t
d
=5.36m D.L
d
=51.47m、t
d
=5.72m
A.6×10
8
m
3
,正常蓄水位为665.00m,设计洪水位为666.20m,相应下游水位为615.00m,校核洪水位为666.80m,相应下游水位为615.85m,拱坝上游河床高程为604.00m,泄流和消能方式采用坝顶自由溢流和跌流消能方式,设计洪水位泄流量为2498m
3
/s,校核洪水位泄流量为2701m
3
/s,共3孔,每净孔宽(出口净宽)为11.00m,堰顶高程为655.00m,鼻坎高程为652.00m,下游阿床底高程为605.50m,最大挑距和最大冲坑深度(
B.L
d
=49.35m、t
d
=5.02m
C.L
d
=51.47m、t
d
=5.36m
D.L
d
=49.35m、t
d
=5.36m
E.L
d
=51.47m、t
d
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