Hỗn hợp X gồm glyxin, alanin và axit glutamic. Hỗn hợp Y gồm tristearin và tripanmitin. Đốt cháy hoàn toàn 0,2 mol hỗn hợp Z gồm m gam X và m gam Y cần dùng 2,59 mol O₂, sản phẩm cháy gồm N₂, CO₂ và 34,2 gam H₂O. Nếu đun nóng m gam Y với dung dịch NaOH dư thì khối lượng glixerol thu được là?

A. 9,2

B. 12,88

C. 11,04

D. 7,36

Hãy kể tên những bộ phận làm bằng vật liệu dẫn điện trong các đồ dùng điện mà em biết. Chúng làm bằng vật liệu dẫn điện gì?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

His brother refuses to even listen to anyone else’s point of view. He is very _______ .

A. narrow-minded

B. kind-hearted

C. open-minded

D. absent-minded

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

  The rules of etiquette in American restaurants depend upon a number of factors the physical location of the restaurant, e.g., rural or urban; the type of restaurant, e.g., informal or formal; and certain standards that are more universal. In other words, some standards of etiquette vary significantly while other standards apply almost anywhere. Learning the proper etiquette in a particular type of restaurant in a particular area may sometimes require instruction, but more commonly it simply requires sensitivity and experience. For example, while it is acceptable to read a magazine in a coffee shop, it is inappropriate to do the same in a more luxurious setting. And, if you are eating in a very rustic setting, it may be fine to tuck your napkin into your shirt, but if you are in a sophisticated urban restaurant this behavior would demonstrate a lack of manners. It is safe to say, however, that in virtually every restaurant it is unacceptable to indiscriminately throw your food on the floor. The conclusion we can most likely draw from the above is that while the types and locations of restaurants determine etiquette appropriate to them, some rules apply to all restaurants.

The author uses the word “draw” in line 16 to mean _____________.

A. pick out

B. drag away

C. evoke

D. infer