题目

根据句意及首字母提示完成单词。【1】The United Nations(联合国) is an i____________ organization.【2】The red paper is usually folded before it is cut into pictures with s____________.【3】My brother has to c____________ the work by himself in two hours.【4】The wood is fired at a very high h____________.【5】Sky lanterns are like small hot­air b____________ when they rise into the air.植物从土壤中吸收的氮可以用于合成 [     ]A．葡萄糖和蛋白质B．核酸和蛋白质C．纤维素和淀粉D．乳糖和核酸