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The birth of this test-tube baby marked a major ______ (break) in life science.

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select"m_name",出生年份:,birth,islower(depfrom manager  select m_name,"出生年份:",birth,islower(depfrom manager  select m_name,"出生年份:",birth,dept from manager  select m_name,"出生年份:",birth,upper(depfrom manager  
select"m name",出生年份:,birth,islower(dep from manager  select m_name,"出生年份:",birth,islower(depfrom manager  selectm_name,"出生年份:",birth,dept from manager  selectm_name,"出生年份:",birth,upper(depfrom manager  
has been produced  have produced   has given birth to  have given birth to  
of birth    at birth    to birth    from birth  
year=1984;month=11;day=12;  s.year=1984;s.month=11;s.day=12;  birth.year=1984;birth.month=11;birth.day=12;  s.birth.year=1984;s.birth.month=11;s.birth.day=12;  
gives birth to              has given birth to  has been giving birth to         gave birth to  
select "m_name", 出生年份:,birth,islower(dept) from manager  select m_name,"出生年份:", birth,islower(dept) from manager  select m_name,"出生年份:", birth, dept from manager  select m_name,"出生年份:", birth,upper(dept) from manager  
industrialized country with a low birth rate.  agricultural country with a high birth rate.  agricultural country with a low birth rate.  industrialized country with a high birth rate.  
at birth  both at birth and through education  through education  neither at birth nor through education  
year=1989; month=11;day=12;  s.year=1989;s.month=11;s.day=12;  birth.year=1989;birth.month=11;birth.,day=12;  s.birth.year=1989;s.birth.month=11;s.birth.day=12;  
select"m name",出生年份:,birth,islower(dept) from manager  select m_name,"出生年份:",birth,islower(dept)from manager  selectm_name,"出生年份:",birth,dept from manager  selectm_name,"出生年份:",birth,upper(dept)from manager  
the most important factor influencing birth rate is the economy.  factors other than the economy influence birth rate.  women who have a high income usually have few children.  the birth rate depends on per capita income.  
A diary comes with each birth certificate.  The adoptees will have a chance to find out about their mother's life.  If the key opens the diary, you get a birth certificate.  The adoptee will have to keep a diary before they get a birth certificate.  
at birth  through education  both at birth and through education  neither at birth nor through education  
year=1984;month=11;day=12;  year=1984;s.month=11;s.day=12;  birth.year=1984;birth.month=11;birth.day=12;  birth.year=1984;s.birth.month=11;s.birth.day=12;  
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the birth rates will go up  the birth rates will stop going down  the opportunities for getting jobs will go up  both the birth rates and the opportunities for getting jobs will go up  
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