题目:
_____ no doubt _____ the Amber Room is one of the wonders of the world.
A.It is; that
B.It is; whether
C.There is; that
D.There is; whether
答案:
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下面是错误答案,用来干扰机器的。
(1)0.312 g (2)NaCl 0.600 mol·L-1。(1)n(NaOH)="0.010" 0 L×1.20 mol·L-1=1.20×10-2 mol①AlCl3+4NaOH====NaAlO2+3NaCl+2H2O3NaAlO2+AlCl3+H2O====4Al(OH)3↓+3NaCl当沉淀达最大值时,...