Job interviews can be very different from country. An interviewer's “body language” and questions, and the form of an interview are not the same around the world.

    If you're at a job interview in Japan, don't look directly into the eyes of the interviewer. It is considered impolite. But if you're at an interview in the US, you should make eye contact(交流) with the interviewer. If you don't, the interviewer may think you are not sure about your ability.

    In the US and some other countries, interviewers aren't supposed to ask questions about family and personal information. In most countries, however, personal questions are very common during job interviews.

    In Germany, your interview might begin with a very short conversation followed by a formal(正式的) interview. In Mexico and many other countries, the whole interview might not be formal.

阅读下面的资料并回答问题：
资料一：一只失去雏鸟的美国红雀，总是给养鱼池边浮到水面张口求食的金鱼喂它 捕来的昆虫，就像喂养自己的雏鸟一样，一连喂了好几个星期。
资料二：很多年前，在英格兰有一只大山雀，一次偶然碰巧打开了放在门外的奶瓶盖，偷喝了牛奶。不久那里的其他大山雀也学会了偷喝牛奶。
（1）从行为获得的途径来说，美国红雀喂鱼的行为属于 ____ 行为.其他大山雀偷喝牛奶的行为属于____ 行为。
（2）美国红雀喂鱼得行为是由其体内的____ 所决定的行为.其他大山雀头偷喝牛奶的行为是在____ 因素的基础上,通过____ 因素的作用而形成的行为.从维持动物自身生存的意义上来说,后一行为比前一行为更____ 。

他们取得了良好成绩的原因有哪些？

世界上使用人数最多的语言是（    ）