猜你喜欢
- 1同中元素组成的物质一定是单质,含氧元素的化合物一定是氧化物,纯净物一定是同种元素组成的对吗不对说明理
- 2什么是经纬线?
- 3I think the life is l_____a dream-we don't know what will happen tomorrow.
- 4He said [ ] a that I am a teacher b I was a teacher c that he is a teacher
- 5某工程由甲单独做63天,再由乙单独接着做28天可以完成,如果甲、乙两人合作需48天完成,现在甲先单独做42天,然后再由乙接着做,还需多少天可以完成?
- 6Mr.Smith ________ short stories,but he ________ a TV play these days.
- 7在等差数列{an}中,首项a1=0,公差d≠0,若ak=a1+a2+a3+…+a7,则k=_.
- 8一串数字9.2.1.3.从第三个数起,每个数字都是它前面两个数之和的个位数上的数
- 9Alice goes to school on foot in the morning改为同义句
- 10In order to achieve the goal of earlier什么意思