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单句改错。 1. DoingA. morning exercisesB. areC. good forD. our health. ________ 2. The teacher sai...

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115  107EX  107EX1  107EX20  
PCI-Ex1  PCI-Ex4  PCI-Ex8  PCI-Ex16  
if(ex1)ex2;else ex3;  if(ex2)ex1;else ex3;  if(ex1)ex3;else ex2;  if(ex3)ex2;else ex1;  
if (ex1) ex2;else ex3;  if (ex2) ex1;else ex3;  if (ex2) ex3;else ex2;  if (ex3) ex2;else ex1;  
if(ex2) ex1; else ex3;  if(ex3) ex2; else ex1;  if(ex1) ex3; else ex2;  if(ex1) ex2; else ex3;  
cosy=(1+ex)/4  cosy=1+ex  cosy=4(1+ex)  cos2y=1+ex  
if(ex2)
ex1;
else
ex3;  
if(ex3)
ex2;
else
ex1;  
if(ex1)
ex3;
else
ex2;  
if(ex1)
ex2;
else
ex3;  
if (ex1) ex2;else ex3;
  
if (ex2) ex1;else ex3;
  
if (ex2) ex3;else ex2;  if (ex3) ex2;else ex1;  
︱ ex+em︱ >1  ︱ ex+em︱ =1  ︱ ex+em︱ <1  ︱ ex+em︱ ≤1