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c**i
发帖数: 6973 | 2 You say, "你跟本不用查找专业文献，反渗透膜是porous 的高分子材料，有点高分子
物理知识的人都知道温度降低，高分子链的热物理性能和构型会发生改变，这样膜的孔
径就会收缩，透水率就会明显降低."
In the primary school, we learn that if we heat a metal with a hole, the
hole will be bigger. Search the Web, with the terms (metal hole heat).
What is used in reverse osmosis (RO) is not metal but polymer. Thus there is
nothing intuitive about how pore will behaves. Indeed emperically there are
two types of pores in a RO membrane.
(1) That temperature affects membrane permeability is a fact. ... 阅读全帖 |
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b********n
发帖数: 38600 | 5 Trump Engaged in Suspect Tax Schemes as He Reaped Riches From His Father
https://www.nytimes.com/interactive/2018/10/02/us/politics/donald-trump-tax-
schemes-fred-trump.html?action=click&module=Top%20Stories&pgtype=Homepage
According to CNBC, the New York taxation department is reviewing allegations
of fraud.
The New York State Tax officials are investigating allegations detailed in
an exhaustive New York Times investigation into Donald Trump and his family'
s business dealings, CNBC has learned... 阅读全帖 |
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s******r
发帖数: 5309 | 8 中国人是世界上最乐观的国民， 远超美国和欧洲。
Eight hundred million people have risen out of poverty. That’s two and a
half times the population of the United States.
China used to make up much of the world’s poor. Now it makes up much of the
world’s middle class.
But by some measures Chinese society has about the same level of inequality
as the United States. Here are the world’s major countries ordered by
inequality and income mobility.
Yet few analysts doubt where the bigger increases will come. Here’s how
modern ... 阅读全帖 |
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b********n
发帖数: 38600 | 10 Nearly 68 percent of Idaho
Today, just 100 families own about 42 million acres across the country, a 65
,000-mile expanse, according to the Land Report
THE FULL LIST: AMERICA’S 100 LARGEST LANDOWNERS
1. John Malone
2. Ted Turner
3. Emmerson Family [Up 3,566 Acres]
4. Reed Family [Up 359,232 Acres]
5. Stan Kroenke
6. Irving Family [Up 1,644 Acres]
7. Brad Kelley
8. Singleton Family
9. Peter Buck [Up 125,000 Acres]
10. King Ranch Heirs
11. Pingree Heirs
12. Wilks Brothers
13. Briscoe Heirs
14. Lyk... 阅读全帖 |
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发帖数: 1 | 11 好消息！美国法官把Trump要求制药公司公开药品价格的命令给否了！
https://www.nytimes.com/2019/07/08/health/drug-prices-tv-ads-trump.html?
action=click&module=Top%20Stories&pgtype=Homepage
A federal judge ruled on Monday that the Trump administration cannot force
pharmaceutical companies to disclose the list price of their drugs in
television ads, dealing a blow to one of the president’s most visible
efforts to pressure drug companies to lower their prices.
哈哈，Trump又被打败了 |
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S*******l
发帖数: 4637 | 12 德银送温家宝15000刀水晶马什么的。
全家大头像都挂出来了。
这是谁在搞谁？
https://www.nytimes.com/2019/10/14/business/deutsche-bank-china.html?action=
click&module=Top%20Stories&pgtype=Homepage
A Brazen Scheme, and a Minor Penalty, for Winning Business in China
By Michael Forsythe, David Enrich and Alexandra Stevenson
Oct. 14, 2019
Updated 12:29 p.m. ET
It was a brazen campaign to win business in China by charming and enriching
the country’s political elite.
The bank gave a Chinese president a crystal tiger and a Bang & ... 阅读全帖 |
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r*s
发帖数: 2555 | 13 By this weekend, several stores in the city had run out of sanitary supplies
such as hand sanitizer, masks and antibacterial wipes. Some people had
tried three or four stores in search of hand sanitizer, before admitting
defeat. Boxes of surgical masks that sold last month for $20 were going for
$75 at one grocery store in Chinatown in Manhattan.
At Costco in Brooklyn, people were stocking up on bottled water, Clorox
wipes, cold medicine and cans of food, anxious for the days and weeks ahead.
ht... 阅读全帖 |
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b********n
发帖数: 38600 | 16 【 以下文字转载自 Military 讨论区 】
发信人: beijingren (to thine own self be true), 信区: Military
标 题: NYC查床铺的税这招跟当初FBI查Al Capone 一样
发信站: BBS 未名空间站 (Tue Oct 2 21:33:56 2018, 美东)
Trump Engaged in Suspect Tax Schemes as He Reaped Riches From His Father
https://www.nytimes.com/interactive/2018/10/02/us/politics/donald-trump-tax-
schemes-fred-trump.html?action=click&module=Top%20Stories&pgtype=Homepage
According to CNBC, the New York taxation department is reviewing allegations
of fraud.
The New York State Tax o... 阅读全帖 |
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b***m
发帖数: 2112 | 20 From: http://www.moreillustrations.com/children%20story/4%20it's%20easy%20to%20destroy%20but%20hard%20to%20build.html
An old Chinese proverb goes something like this: "Any fool can throw a stone
down a well, but it takes a wise man to get it out!" Which is one way of
saying that anybody can tear down, but it's difficult to build up.
Not many years ago this happened: A small boy of four wanted to ride his
older sister's tricycle. He had taken his turn, but he wanted another, and
before the others... 阅读全帖 |
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