From the dialogue, Jack worries about _______.f025e0f66cfad8510d62b30123c56922.png
what to wear
举一反三
- Questions 11～13 are based on the following dialogue on Thanksgiving in the United States. What can we learn about Jack from the dialogue A: He’s a native in America. B: He’s a new comer to America. C: He knows very well about the holiday. D: He dislikes this kind of holiday.
- TRUE OR FALSE Dialogue:Hijack is mentioned in the dialogue. What is a hijack? Do you often hear people talking about hijacks? Listen to the dialogue and decide whether the following statements are true or false. Write T or F in the space provided. ( ) 1. Etienne Bertrand is from Switzerland.
- f(x)在[0,1]上有连续的二阶导数，f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]
- Listen to a story about Jack’s fear and decide whether the following statements are T (true) or F (false). [音频] 1. When Jack gets into bed, he thinks there's somebody hiding under the bed. ( T or F) 2. As Jack lies under the bed, there must be somebody sleeping on top of it. (T or F) 3. The doctor asks Jack to see him three times a week for two years to cure his fears. (T or F) 4. The doctor charges Jack $200 a visit. (T or F) 5. Jack is willing to pay the amount the doctor charges. (T or F)/module/audioplay.html?objectid=9240fb7e773b192fa91fab438f67ad4a
- 室内排水管道最小坡度为（）。 A: 0.01°~ B: 025° C: 0.1°~0.25° D: 0.02°~0.05° E: 0.2°~ F: 5°
内容
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设f（x）=（1＋x）cosx，欲使f（x）在x=0处连续，则f（0）定义为（）。 A: f（0）=0 B: f（0）=e-1 C: f（0）=1 D: f（0）=e
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Listen to the dialogue about working from home. Q: According to the woman, why does working from home make sense?
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设f(x)=x2+bx+x满足关系式f(1+x)=f(1-x)，则下述结论中，正确的是( )． A: f(0)＞f(1)＞f(3) B: f(1)＞f(0)＞f(3) C: f(3)＞f(1)＞f(0) D: f(3)＞f(0)＞f(1) E: f(1)＞f(3)＞f(0)
- 3
下列哪个选项是函数 f：N→Z，f(n)=n² 的递归定义？ A: f(n)=nf(n-1)+1，f(0)=0 B: f(n)=f(n-1)+(2n-1)，f(0)=0 C: f(n)=f(n-1)²，f(0)=0 D: f(n)=f(n-1)+(2n+1)，f(0)=0 E: f(n)=2f(n-1)+2
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设在[0，1]上f""(x)＞0，则f"(0)f"(1)，f(1)-f(0)或f(0)-f(1)的大小顺序是() A: f"(1)＞f"(0)＞f(1)-f(0)。 B: f"(1)＞f(1)-f(0)＞f"(0)。 C: f(1)-f(0)＞f"(1)＞f"(0)。 D: f"(1)＞f(0)-f(1)＞f"(0)。