单选题：听录音，回答以下问题：The talk is mainly about__________

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听录音，回答以下问题：
The talk is mainly about__________ A．the importance of eating a good breakfast
B．a new reduction plan
C．the daily requirement of nultrients
D．problems brought by dieting

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设一个十进制整数为D>1，转换成十六进制数为H。根据数制的概念，下列叙述中正确的是（　　）。

设一个十进制整数为D>1，转换成十六进制数为H。根据数制的概念，下列叙述中正确的是（　　）。A．数字H的位数≥数字D的位数 B．数字H的位数≤数字D的位数 C．

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Which of the following is recommended by experts?A．Riding bicycles for a long di

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The word“grubstake”in paragraph 2 means_____．

The word“grubstake”in paragraph 2 means_____． A．to supply miners with food and

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Write on ANSWER SHEET THREE a note of about 50-60 words bas

Write on ANSWER SHEET THREE a note of about 50-60 words based on the following

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听音频，回答以下问题。What ale the two speakers talking about?

听音频，回答以下问题。What ale the two speakers talking about?A．How to arrange for a tri

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