下列物质按不同类别分组，所得组合最不合理的是（ ）
(1)糖类 (2)塑料 (3)石油 (4)蛋白质 (5)合成纤维 (6)棉花 (7)陶瓷 (8)玻璃
(9)天然气 (10)水泥 (11)合成橡胶 (12)煤 (13)油脂 (14)羊毛
| A．(1)、(4)、(13) | B．(2)、(5)、(11) |
| C．(7)、(8)、(10)、(14) | D．(3)、(9)、(12) |
相关试题
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
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