Improper Silicon apply on the Hopper Collector 这句话是什么意思啊?

有关improper integral反常积分的一道简单积分题 题目：∫(-∞,+∞) x/(x^2+5)^1/2 dx 讨论这个积分是否存在.（x除以根号下x平方加5,从负无穷积分到正无穷）

我求到这一步：∫(-∞,+∞) x/(x^2+5)^1/2 dx = ∫(0,+∞) x/(x^2+5)^1/2 dx + ∫(-∞,0) x/(x^2+5)^1/2 dx
= lim(x→+∞) [(x^2+5)^1/2] (0,x) + lim(x→ -∞) [(x^2+5)^1/2] (x,0)
算出来两边的limit都是趋向无穷的,最后得到∞-∞.这不应该是0吧.
要怎么能判断这整个积分是否存在呢?

看似很简单的题,怎么都想不通.求高人帮忙指点下,谢谢!

这几句英语还有错误吗?
Improper competition disturbed the market order heavely.
To prevent and eliminate restrictions on competition and unfair competition,It's high time to identify the acts of unfair competition and combat with them,not only for protecting and encouraging proper cometition,which is the original power of market-economy,but also the development of socio-economy.
This controversial problem has become the current issues requiring urgent solution.
So the article aims to make the definition of unfair competition acts clearer so as to solve it.

英语翻译
5道英文选择题,小人请达人们来在线解答,谢谢叔叔阿姨奶奶爷爷的拉
1 Improper food can damage your hair,[ ]
A so can the stress in life B so the stress in life can
C neither can the stress in life D neither the stress in life can
2 I can not sleep because it is []
A too much hot B much too hot
C hot too much D hot much too
3 Not until I began to work[] how much time I had wasted.
A didn't I realize B did I realize
C I didn't relize D I realized
4 So[] that no fish can live in it.
A the lake is shallow B shallow the lake is
C shallow is the lake D is the lake shallow
5 Little[] about his own safety,though he was in great danger himself.
A does he care B did he care
C he cares D he cared
还有这种题目是什么类型的呀
首先感谢5位的回答，大家不要急于回答，看看自己回答得是否有问题。

求翻译：“express 3.36 as an improper fraction in its lowest terms”

what is improper about the sentences below so that they r not allowed to surface?
2."pat sb.on the back" or "give sb a pat on the back" r idioms meaning to praise sb for what s/he has done as what s/he has done was great.so "she needs a pat on the back" would mean.

what`s the improper response of 'will you be going back hone for the Spring Festivel?'
（你春节回家吗?）回答不恰当的是：
A、sure Bcertainly C、of course

It is improper for man and woman to hold each other's hands.pass objects from hand to ha
It is improper for man and woman to hold each other's hands.pass objects from hand to hand..

Your improper words will give ____ to doubts concerning your true intentions.
A.rise
B.reason
C.suspicion
D.impulse
问一下A和D在这句话中的区别……我对两者不知如何作出取舍.

Lingo运行出现“Improper use of set name”,怎么修改?

model:
sets:
num1/nl1/:i;
num2/nz0..nz33/:j;
endsets
目标函数;
min=@sum(num1(I):@sum(num2(J):num1(I)*Q-X0*((num1(I)-1)*t+num2(J))))*0.2+282*0.2+18*m*q+75*m+48000;
约束条件;
3+(m-1)*t<=36;
3+m*t>36;
Q>=X0*t;
K0+m*Q>=36*X0;
X0=94;
K0=188;
数据输入;
data:
i=1;
j=0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33;
enddata
end