冠词

Because of that, when memorizing the vocabulary, it is important to memorize the articles of the words as well.

所以，在记单词时同时记住单词的冠词也是很重要的。

And what does AD stand for?---Well, AD is the abbreviation for the Latin term Anno Domini, which means in the year of our Lord, so AD actually marks the birth of Jesus.---What about the time before Jesus was born?---Well, we would use BC, which stands for Before Christ.

I see。今年是2009年，讲得明确一点的就是AD 2009，AD表示Anno Domini这是个拉丁文的字表示西元，而西元前要用BC，也就是Before Christ，AD通常会放在年份的前面，BC要放在年份的后面，另外如果要来表示是第几世纪我们要用序数，前面要用定冠词，所以并不是21 century而是the 21st century

Players use their paddles to hit or block the ball while the other team is trying to score.

a。 other 表『其他的』，前面若无定冠词 the 时，通常要接复数名词，故不可选。

For the current caused by dielectric absorption to dissipate.

这里用了一个三个介词和一个特指定冠词。。。。for the。。。。by。。。。to。。。

The bathyscaphe, a free-moving vessel designed for underwater exploration,A consists of a Flotation compartment with a observation capsule attached underneath it.

解析：注意D的attached underneath没有错误，不用改成attached to，许多诸如水妖的语法笔记和其他笔记的解答认为D错误是完全错误的，因为前面的C有个如此明显的冠词误用。

Located in Canada, the Columbia Icefield covers area of 120 square miles and

A 错。注：这种涉及冠词的题通常不易判断，要特别注意。

A knife is a tool for cutting with.

不定冠词在表示&一&的概念时，是非强调性的。

A knife is a tool for cutting with. Mr. Smith is an engineer.

不定冠词在表示&一&的概念时，是非强调性的。

A knife is a tool for cutting with.

不定冠词在表示&一&的概念时，是非强调*的。

A knife is a tool for cutting with.Mr. Smith is an engineer.

the为定冠词，指特定的人或物或表示某一类的人或物，可以用在元音因素和辅音因素前面。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。