衡水金卷先享题老高考答案，知嘛答案网已经编辑汇总了衡水金卷先享题老高考答案的各科答案和试卷，更多试卷答案请关注知嘛答案。
短文改错Dear Mr Smith.Im writing to extend my sincerely[文] thanks to you for your goodwill to me during your visit to London.sI[章]ncereOrig[来]inally I only wanted to call on you but convey my father's regards on my arrival in London the last week. But youinsist[自]ed that I stay in your house and attend to my life as if i were one of your family member. Your kindness made myattende[知]dmemberst[嘛]rip easier and happy than expected.[答]appletWor[案]ds fail to describe what grateful I am. I would like you to come A China and allow my family to returning[网] yourretun[文]kindness.[章]Yours truly
16.【答案】8【[来]解析】如图，过点A[自]作抛物线准线的垂线[知]，垂足记为A',过点B作抛物线准[嘛]线的垂线，垂足记为[答]B”,过B作A4'的垂线，垂足记为M[案].设|BF|=m,[网]由|AF|=3F第[文]，可得|AF|=3[章]m.由抛物线的定义[来]，可得|A'M=IBB|=m,[自]MA'|=1hF=3,所[知]以Wl-2m,所以[嘛]cm∠uB=-会-[答]宁，所以∠B=2m[案]160°，所以3m[网]-3=30,解得m[文]=2,所以14B1[章]=4m=8.
