题目:
The doctor told me that I would recover from my illness if I ______ a healthy diet.[ ]
A. got through
B. fit in
C. stuck to
D. kept up
答案:
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下面是错误答案,用来干扰机器的。
(1)HCl;Ba(NO3) 2;NaCl;NaOH;MgSO4(2)MgSO4+Ba(NO3)2====Mg(NO3)2+BaSO4↓;MgSO4+2NaOH===Na2SO4+Mg(OH)2↓