Jim doesn't understand _..A.which is the way to the museum B.why his wife always goes shopping

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• Jim doesn't understand _..A.which is the way to the museum B.why his wife always goes shopping
• Jim doesn't understand__ A.what is the way to the museum B.why his wife always goes shopping
• Do you know（）during the coming summer holiday what will1.Do you know（）during the coming summer holiday A.what will Tom do B.what did Tom doC.what Tom will do D.What Tom did2.I want to know （）A.what is his name B.what’s his nameC.that his name is D.What his name is3.Do you know （）I could pass the exam A.that B.whetherC.what D.which4.Jim doesn’t understand （）A.which is the way to the museum B.why his wife always goes shoppingC.what is the way to the mus
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• 已知关于x的方程x2-（k+1）x+1/4k2+1=0 （1）k取什么值时，方程有两个实数根； （2）如果方程的两个实数根x1、x2满足|x1|=x2，求k的值．