UNIT 1 PART 1 SECTION A TASK 2 There are five short dialogues about making requests and offers. Listen to the dialogues and choose the correct answer to each question. Q: What does the man offer to do?
A.
Climb to the top shelf.
B.
Get someone else to help her out.
C.
Grab something off the top shelf.
D.
Leave the woman alone.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【单选题】以下说法错误的是( )。
A.
一般在哈夫曼树中, 权值越大的叶子离根结点越近。
B.
哈夫曼树中没有度数为 1 的分支结点。
C.
若初始森林中共有 n 棵二叉树,最终求得的哈夫曼树共有 2n-1 个结点。
D.
构造 哈夫曼树时, 若初始森林中共有 n 棵二叉树,进行 2n-1 次合并后才能剩下一棵最终的哈夫曼树。
【简答题】According to the passage, what did the Chinese use to make the “original” ice cream? A. A frozen mixture of milk and egg. B. A frozen mixture of water and egg. C. A frozen mixture of milk and rice. D....