问题
单项选择题
以下各项表述错误的是( )。
A．生物量是指单位面积或体积内生物体的重量
B．生态因子是指生物或生态系统的周围环境因素
C．频度是指在景观体系中某一类型拼块在某一地域中的数目与拼块总数的百分比
D．生物群落是指在一定的区域或一定的生境中各个生物种群相互松散结合的一种结构单元
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
以下各项表述错误的是( )。
A．生物量是指单位面积或体积内生物体的重量
B．生态因子是指生物或生态系统的周围环境因素
C．频度是指在景观体系中某一类型拼块在某一地域中的数目与拼块总数的百分比
D．生物群落是指在一定的区域或一定的生境中各个生物种群相互松散结合的一种结构单元
参考答案：C
| 完形填空。 | |||
| Agatha Christic would never forget the night when she met a robber(抢劫者) many years ago . That evening, she went to a birthday partly which l until two o'clock in the morning Agatha walked in the __2 street alone. Suddenly from the back of a dark 3 , a tall man with a sharp knife in his right hand ran out at her. "Good 4 _, lady," the man said in a low voice. "I don't. think you wish to 5 here! " “What do you want?" “Your earrings. Take them off! " Agatha suddenly had a 6 idea. She tried to cover her necklace with the collar (衣领) of her overcoat while she used __7 _ hand to take off both of her earrings and then quickly 8 them on the ground. "Take them and let me go," she said. The robber thought that the girl didn't like the earrings at all, only trying to 9 _ the necklace. It would cost 10 _, so he said, "Give me your necklace. " "Oh, sir. It doesn't 11 much. Please let me wear it. " "I'm not that 12 .Quick!" With shaking 13 , Agatha took off her necklace. As soon as the robber left, she picked up her earring sand ran as 14 as she could to one of her friends. The earrings cost 480 pounds and the necklace the robber had taken away cost _ 15 six pounds. | |||
| ( )1. A. ended ( )2. A. busy ( )3. A. part ( )4. A. morning ( )5. A. die ( )6. A. funny ( )7. A. other ( )8. A. handed ( )9. A. own ( )10. A. cheap ( )11. A. weigh ( )12. A. afraid ( )13. A. hands ( )14. A. much ( )15. A. really | B.stayed B. quiet B. block B. afternoon B. escape B. safe B. others B. threw B.do B. expensive B. take B. angry B. feel B. early B. already | C.stopped C. noisy C. building C. evening C. right C. brave C. the other C. passed C. have C. more C. spend C. silly C. head C. carefully C. only | D.lasted D. wide D. street D. night D. stay D. bright D. another D. put D. protect D. less D. cost D. bad D. body D. fast D. hardly |