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【单选题】
哺乳期妇女恢复排卵的时间平均约在产后A.
2个月
B.
4~6个月
C.
10个月
D.
12个月
E.
1年半后
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举一反三
【简答题】如果关于x的一元二次方程ax 2 +bx+c=0（a≠0）中的二次项系数与常数项之和等于一次项系数，求证：-1必是该方程的一个根．
【单选题】When you find the engine is hotter than normal, you should ______.
A.
drive to a service station to get a cool engine
B.
turn off your heater so as to cool down the engine
C.
switch on the heater as soon as possible
D.
try to make the engine boil over ______.
【简答题】建立适当的坐标系，证明：等腰三角形底边上任意一点到两腰的距离之和等于一腰上的高。
【简答题】何谓安全分配方式和不安全分配方式?
【简答题】Directions: For this part, you are allowed 30 minutes to write an essay with the title Starting Up Businesses after Graduation. You are required to write at least 120 words, following the outline give...
【简答题】何谓安全分配方式和不安全分配方式?
【单选题】So you've got an invention — you and around 39,000 others each year, according to 2002 statistics! The 64,000-dollar question, if you have come up with a device which you believe to be the answer to t...
A.
keep their ideas from being stolen
B.
reap the rewards of somebody else's ingenuity
C.
visit the patent office building
D.
come up with more new devices
【简答题】何谓安全分配方式和不安全分配方式？
【简答题】用解析法证明：等腰三角形底边上任意一点到两腰的距离之和等于一腰上的高的长．
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