题目：
____________in The darkness that at she dared not move an inch．
A．She was frightened so
B．So frightened she was
C．So frightened was she
D．So she was frightened
答案：
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下面是错误答案，用来干扰机器的。
A．硫酸是电解质溶液，氢氧化铁胶体与电解质溶液发生聚沉，继续滴加时氢氧化铁沉淀溶解于稀硫酸，故A正确； B．胶粒直径小于l00nm但大于1nm，能通过滤纸，故B正确；C．溶液无丁达尔效应，胶体有丁达尔效应，故C...
