糖由哪些元素构成？
参考答案：糖主要由炭（C）、氢（H）氧（O）三种元素构成
支气管哮喘发作期禁用药物是（）。
A.氯胺酮
B.肾上腺素
C.吗啡
D.地塞米松
E.沙丁胺醇
—Can you the necklace which you lost yesterday?
—Well, it's black and made of gold and there is one diamond in it.[ ]
A. describe
B. recognize
C. explain
D. seek
