连词成句。
1. the, his, to, tried, make, pay, mother, to, attention, him, boy, more
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2. these, hardly, I, concerts, time, days, have, for
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3. on. children, studying, should, their, spend, time, more
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4. something, the, every, we, window, hear, outside, night, strange
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5. to, the, book, situations, of, on. what, do, in, lots, gives, advice
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＝（3，5，-2），
0＝（2，1，4），要使λ
＝（0，0，1）垂直，则常数λ与μ应满足关系（）。