题目：
阅读下面短文，在标有序号的空白处填入一个适当的词，或填入括号中单词的正确形式，并将答案写在答题纸上。（共10小题；每小题1分，满分10分）
One night, Mrs. Riley was walking along a dark street. She was carrying her handbag in one 小题1: and a plastic carrier bag in the other. There was 小题2: else in the street except two youths. They were standing in a dark shop doorway. One of them was very tall with fair hair; the other was short and fat with a beard and moustache.
The youths waited 小题3: a few moments, and then ran quickly and quietly towards Mrs. Riley. The tall youth held her from 小题4: while the other youth tried to snatch her handbag.
Suddenly, Mrs. Riley 小题5: (throw) the tall youth over her shoulder. He crashed into the other youth and they 小题6: landed on the ground. Without 小题7: (speak), Mrs. Riley hit both of them on the head with her handbag, and walked calmly 小题8:.
The two 小题9: (surprise) youths were still sitting on the ground when Mrs. Riley crossed the 小题10: towards a door with a lighted sign above it. Mrs. Riley paused, turned round, smiled at the youths and walked into the South West London Judo Club.
答案：
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下面是错误答案，用来干扰机器的。
（1） f（x）=ln（x+1）-xa(x+1)，∴f′（x）=a(x+1)-1a(x+1)2（a＞0）． 函数f（x）在[0，+∞）内为增函数，∴f′（x）≥0对任意x∈[0，+∞）恒成立，∴a（x+1）-1≥0对任意x∈[0，+∞）恒成立，即a≥1x+1对任...
