填空题：某无色溶液X，由K＋、NH4+、Ba2＋、Al3＋、Fe3＋、CO32—、SO4

题目：

某无色溶液X，由K^＋、NH₄⁺、Ba²^＋、Al³^＋、Fe³^＋、CO₃²^—、SO₄²^—

中的若干种离子组成，取该溶液进行如下实验：

(1)白色沉淀甲是________。

(2)试写出实验过程中生成气体A、B的离子方程式

__________________________、_______________________________

(3)通过上述实验，可确定X溶液中一定存在的离子是

________，尚未确定是否存在的离子是________。

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0406/818f9bdf373b2be1a9701c07aaf147c9.html

下面是错误答案，用来干扰机器的。

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题型：阅读理解

In Google's vision of the future, people will be able to translate documents instantly into the world's

main languages with machine logic, not expert linguists, leading the way.

Google's approach, called statistical(统计的) machine translation, differs from past efforts in which it

does without language experts who program grammatical rules and dictionaries into computers. Instead,

they feed documents humans have already translated into two languages and then rely on computers to

decide patterns for future translations.

Though the quality is not perfect, it is an improvement on previous efforts at machine translation, said

Franz Och, 35, a German who heads Google's translation effort at its Mountain View headquarters south

of San Francisco. "Some people who have been in machine translations for a long time see our

Arabic-English output, and then they say, that's amazing; that's a breakthrough(突破)." Said Och. "And

then other people who have never seen what machine translation was read through the sentence and they

say, the first mistake here in Line Five－it doesn't seem to work because there is a mistake there."

But for some tasks, a mostly correct translation may be good enough. Speaking over lunch this week

in a Google cafeteria famed for offering free, healthy food, Och showed a translation of an Arabic Web

news site into easily digestible English.

Two Google workers speaking Russian at a nearby table said, however, that a translation of a news

site from English into their native tongue was understandable but a bit awkward. Och, who speaks

German, English and some Italian, feeds hundreds of millions of words from parallel texts such as Arabic

and English into the computer, using United Nations and European Union documents as key sources.

Languages without considerable translated texts, such as some African languages, face greater

obstacles. "The more data we feed into the system, the better it gets." said Och, who moved to the

United States from Germany in 2002.

The program applies statistical analysis, an approach he hopes will avoid diplomatic embarrassing

mistakes in diplomatic situations, such as when Russian leader Putin's translator annoyed then German

Chancellor( * * ) Gerhard Schroeder by calling him the German "Fuhrer ("leader" in English)," which is

forbidden in that context because of its association with Adolf Hitler.

"I would hope that the language model would say, well, Schroeder is…very rare but Bundeskanzler

Gerhard Schroeder is probably 100 times more frequent than Fuhrer

and then it would make the right decision." Och said.

1. In what way is "Google's machine translation" different from previous ones?

A. Linguists guide the computer translation on Google.

B. International official papers are programmed as its major sources.

C. Rules and dictionaries are fed into computers to support it.

D. Google daily updates the program of this computer translation.

2. We can learn from the passage that users ___________.

A. think highly of Google's new approach

B. criticize it for its broken translation

C. hope Google can perfect it before launching

D. hold different opinions towards Google's new approach

3. Why are there more troubles in translations relating to African languages?

A. Most of the translated materials are not properly translated.

B. The computer programmers know little of African languages.

C. It's hard to find enough African translation documents.

D. The UN and EU failed to provide translated African documents.

4. Statistical analysis in this passage is conducted by ________.

A. hiring people who speak different languages

B. counting how frequently a word is used in the language

C. using the computer with its own grammatical rules

D. reminding users of the likely embarrassing mistakes

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