问题
单项选择题
无脊椎动物中，与脊索动物关系密切的类群是（）。
A、环节动物
B、棘皮动物
C、软体动物
D、节肢动物
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
无脊椎动物中，与脊索动物关系密切的类群是（）。
A、环节动物
B、棘皮动物
C、软体动物
D、节肢动物
参考答案：A
| 完形填空。 | |||
| I've often puzzled over something that happened to me one winter when I was eight. Over the years I had been wondering if my 1 was nothing more than a kid's imagination. There was a 2 near our house. In winter it was the greatest 3 place in the world. One 4 all I wanted to do was go skating. I had been waiting for weeks 5 the water was frozen solid. Mom had one rule: "Never ice-skate alone." But I couldn't 6 any longer that afternoon. So I 7 my skates under my coat and ran to the pond. Several people were skating near the shore, and some kids were playing hockey. I was not really 8 . The hockey game had attracted 9 audience, so I skated in the other direction until their cheering 10 . But another noise came soon. The ice was cracking beneath me. Freezing water 11 my body, and I sank like a rock. My feet 12 the bottom. Just when I thought I wouldn't last another 13 , I felt a tap on my shoulder. "Don't worry," someone said. I swung my 14 around. I couldn't see anybody. But I heard the voice again,"Push your feet into the bottom and you'll shoot straight up to the surface." I did as I was told and 15 . I crawled to the shore and lay down, 16 .The next thing I knew was people were 17 around me, covering me with coats. When I awoke, I was home in my own bed. Mom sat next to me, 18 my hand. "I saw nobody there. It must be an angel that came to my 19 ." I said. Mom smiled, "I just thank God you're safe." For a long time I thought I would 20 a more realistic explanation if I just thought hard, but I never did. | |||
| ( )1. A. attention ( )2. A. river ( )3. A. skating ( )4. A. afternoon ( )5. A. after ( )6. A. go ( )7. A. found ( )8. A. lonely ( )9. A. noisy ( )10. A. changed ( )11. A. filled ( )12. A. hit ( )13. A. day ( )14. A. head ( )15. A. left ( )16. A. worried ( )17. A. lying ( )18. A. raising ( )19. A. place ( )20. A. take up | B. behavior B. pond B. fishing B. morning B. until B. run B. threw B. single B. happy B. disappeared B. controlled B. dragged B. hour B. hand B.succeeded B. surprised B. standing B. shaking B. mind B. make up with | C. explanation C. lake C. swimming C. evening C. as C. sit C. took C. alone C. small C. increased C. covered C. set C. minute C. arm C. tried C. excited C. laughing C. holding C. defense C. bring up | D. reason D. dam D. skiing D. night D. if D. wait D. hid D. afraid D. young D. stopped D. loaded D. tapped D. second D. leg D. survived D. exhausted D. crawling D. washing D. rescue D. come up with |