He gave me a reason to suck at tones, my tongue isn't yellow enough!Which answer correctly interprets the sentence?
A. He helped me understand why I am so bad at distinguishing tones, for mandarin tones are easier for Asians than for westerners.
B. He explained why I am always confused by tones, only people with yellow skin are able to figure out the difference.
C. He helped me understand why I am so bad at pronouncing tones, I am not used to rolling my tongue.
D. He explained why I have difficulty in tones, Chinese language has so many dialects.
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What is the secret she discovered to tone speaking success?
A. Listen to audio files of initials, finals and tones every day.
B. Learn pronunciation and vocabulary in the way children learn English.
C. Talk with children, not adults.
D. Learn Chinese pop songs.
Which of the following is not true according to the passage?
A. She couldn’t recognize the tones even though the words are written down in Pinyin.
B. táng and tāng sound the same to her.
C. She teaches kids English by means of rhymes and songs.
D. She can impress Chinese friends at KTV with Chinese pop songs.
用二维表结构表示实体和实体间关系的数据模型为________。
A. 关系模型
B. 层次模型
C. 网状模型
D. 面向对象模型
最常用的一种基本数据模型是关系数据模型，它采用________表示。
A. 树
B. 网络
C. 图
D. 二维表
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