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【单选题】
在从原点出发的直线和TC的切点上,ACA.
是最小的
B.
等于MC
C.
等于AVC+AFC
D.
上述都正确
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举一反三
【单选题】有一浓度为0.1mol/L的三元弱酸,已知Ka1=7.6x10-3,Ka2=6.3x10-7 Ka3=4.4x10-13,则有( )个滴定突跃
A.
1
B.
2
C.
3
D.
4
【单选题】Last Saturday was Mary's birthday. [ ]
A.
twelve
B.
twelfth
C.
the twelfth
D.
the twelve
【单选题】I am years old today. And my parents have a party for my birthday .
A.
twelfth; twelve
B.
twelfth; twelfth
C.
twelve; twelfth
【单选题】_____ day of May is May 12 th . [ ]
A.
Twelve
B.
Twelfth
C.
The twelveth
D.
The twelfth
【单选题】There are _____ in a year. [ ]
A.
twelve month
B.
twelve months
C.
twelfth month
D.
twelfth months
【简答题】VISSIM路网又静态数据和( )两部分组成。
【单选题】The boy is _____. Today is his _____ birthday. [ ]
A.
twelfth; twelfth
B.
twelve; twelfth
C.
twelfth; twelve
D.
twelve; twelve
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