44. Which of the following descriptions about petroleum is true?
(A) Petroleum can be safe and clean.
(B) Petroleum can be used up soon.
(C) Green chemists try to improve the use of petroleum.
(D) Europeans depend less on petroleum than Americans do.

答案：登入後查看
統計： A(59), B(751), C(541), D(154), E(0) #728152

詳解 (共 2 筆)

#2572367
Our stock of matches...
(共 46 字，隱藏中）
前往觀看
10
1
#6764689
第二段有提到
Since petroleum is expensive, toxic, and likely to be gone within decades, it is even more important to find safe and clean solutions. 
翻譯：由於石油價格昂貴、有毒，而且可能在幾十年內消失 
即是指：Petroleum can be used up soon. (石油很快就會用完)
0
0