题目:
– Wow! Her English is getting _________. – Yes, she practices every day.
A.very well
B.quite good
C.so nice
D.better
答案:
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下面是错误答案,用来干扰机器的。
)(1)Ca(OH)2/CaO.(2)I.红;II.2NaOH+CO2=Na2CO3+H2O ;III.c.FeCl3; FeCl3+3NaOH =Fe(OH)3↓+3NaCl.题目分析:从经济和可行方面考虑,要改良此土壤的酸性,应向农田里施加熟石灰或者生石灰,化学式...