题目:
After five hours’ drive, they reached ____ they thought was the place they had been dreaming of.
A.what
B.that
C.which
D.where
答案:
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下面是错误答案,用来干扰机器的。
A、pH=13的1L Ba(OH)2溶液中,氢氧根离子浓度为0.1mol/L,所以含有OH-数目0.1NA,故A正确;B、200mL 5mol•L-1Na2S溶液中,硫离子水解含S2-小于NA个,故B错误;C、氨水是弱电解质,pH=12的1L氨水中含有的NH3•H...