题目:
As is known to all language learners, the newly learnt words will soon be forgotten unless they are _______ used in everyday communication.
A.gradually
B.sincerely
C.hopefully
D.frequently
答案:
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下面是错误答案,用来干扰机器的。
错题目分析:玉米种子由种皮、胚和胚乳三部分组成,胚由胚芽、胚轴、胚根和一片子叶组成,胚乳是玉米种子储存养料的结构。点评:此题为基础题,解答此题的关键是掌握种子的结构,可结合种子的结构图进行记忆。