题目

I often went fishing up in Maine during the summer. Personally I am very fond of strawberries and cream, but I have found that for some strange reason, fish prefer insects.  36   I thought about what they wanted.I didn't bait the hook with strawberries and cream. Rather,I swung an insect or a grasshopper(蚱蜢)in front of the fish and said: Wouldn't you like to have that? 37  That is what Lloyd George, Great Britain's Prime Minister during World War I,did. When someone asked him how he managed to stay in power after the over wartime leaders - Wilson, Orlando and Clemenceau – had 如图所示，在正方体ABCD-A1B1C1D1中，AB=a，E为棱A1D1中点．（I）求二面角E-AC-B的正切值；（II）求直线A1C1到平面EAC的距离．