完形填空
One night last February, seventeen-year-old Duffy drove home1 a winding road, he saw a 2light thrown against the tree. “I knew it wasn't the moon”, he said. “I drive this road 3and I notice little things 4”
Duffy stopped his car and got out to 5Below him far down in the deep valley 6a broken car with its headlights on. Thirty minutes 7a man had driven off the edge of the road, which has no guardrail（护栏）. His car fell and8over, landing on its top more than two hundred feet 9
Duffy 10to call for help, then returned and got down to reach the 11driver. Snow covered the valley and the temperature was below 12After struggling back up the cliff（悬岸）, Duffy 13his jacket and shirt and wrapped the injured man in time, along with the blankets from his 14.
15deeds are starting to become16action for Duffy, the oldest of seven children. When he was 12, he17his ten-year-old brother from drowning（溺水）. Two years ago, his three-year-old sister 18rat poison（毒药）, and Duffy cleaned out her mouth, made her drink milk to protect her 19and called doctors.
“We have tried to teach the children good 20and it looks like we have got some reward for it,” his father says.
行：①把贝壳制成石灰乳；②在引入的海水中加入石灰乳，沉降、过滤、洗涤沉淀物；③将沉淀物与盐酸反应，结晶过滤、在HCl气体氛围中干燥产物；④将得到的产物熔融电解得到镁。下列说法不正确的是
