Why was stearin used in candles?
Giải bởi Vietjack
D
Kiến thức: đọc hiểu
Tạm dịch: Tại sao stearin được sử dụng trong nến?
A. Nó tạo ra ngọn lửa nhiều màu sắc hơn so với tallow.
B. Nó che được mùi khó chịu trong không khí.
C. Nó được sử dụng để loại bỏ chất béo trong nến.
D. Nó giúp nến đốt cháy lâu hơn.
Thông tin: Candles that contained stearin would burn longer than previous ones and had a better smell.
Which of the following is closest in meaning to crux in paragraph 4?
The changes possibly caused by the cell phones are mainly concerned with ____________.
According to the text, what dose the increase of candle sales illustrate?
What does the author mean by stating that “function should determine form”?
According to the passage, what makes mobile phones potentially harmful is ____________.
Many studies on emotional expressions try to answer the question whether _________.
Which of the following is NOT mentioned as evidence that the length of the workweek has been declining since the nineteenth century?
