叶轮给煤机行车的目的是为了实现沿沟煤纵向给煤，也是为了保证检修时将叶轮给煤机引出煤槽 发布时间：2017-10-26 04:16 │ 来源：www.tikuol.com 题型：判断题 问题： 叶轮给煤机行车的目的是为了实现沿沟煤纵向给煤，也是为了保证检修时将叶轮给煤机引出煤槽。
题型：判断题 阅读理解。 Big Ben is not the name of a man. It is the name of a huge clock in London. This clock has four faces, so no matter (无论) where you stand, you can read the time on the face of Big Ben. Each face is the size ofa double-decker (双层的) bus. The hands are about four meters long. If you go to London, you may want to visit the House of Parliament (国会大厦). You will find Big Ben sitting at the top of the clock tower (塔) in the House of Parliament. You will hear it as well as see it. The bigclock makes such a loud sound. "Ding dong, ding dong" as it goes every quarter of an hour. The clock was named after a big man. He was Sir Benjamin Hill. He did much building work in Londonmany years ago. 1. Big Ben is ______. [ ]A. a double-decker bus B. a huge clock C. the name of a man D. a name of the House of Parliament 2. The clock strikes every ______ of an hour. [ ]A. ten minutes B. fifteen minutes C. thirty minutes D. forty-five minutes 3. ______ have the same meaning as "large". [ ]A. Big and double B. Huge and loud C. Big and huge D. Giant and small 4. You can read the time of Big Ben ______. [ ]A. at the top of the clock tower B. only in the House of Parliament C. on the hands of the huge clock D. on the four faces of the clock 5. The title (标题) of the passage may be ______. [ ]A. Big Ben B. A Clock C. Sir Benjamin Hill D. The Capital of the UK 查看答案
题型：判断题 某动物精原细胞在减数分裂过程中形成了四个四分体，则其减数第二次分裂后期的次级精母细胞中染色体数、染色单体数和DNA分子数依次为 [ ]A．4、8、4 B．4、0、4 C．8、16、16D．8、0、8 查看答案
题型：判断题 对甲烷（CH4）有如下描述：A．难溶于水；B．能燃烧；C．可作燃料．（1）用序号回答：描述甲烷物理性质的是______，描述甲烷用途的是______；（2）请写出甲烷在空气中燃烧的化学方程式______． 查看答案