受生物性污染的水体最易引起（） A.介水传染病 B.急性中毒 C.慢性中毒 D.公害 发布时间：2017-06-28 23:29 │ 来源：www.tikuol.com 题型：单项选择题 A1型题 问题： 受生物性污染的水体最易引起（）A.介水传染病B.急性中毒C.慢性中毒D.公害病E.恶性肿瘤
题型：单项选择题 A1型题 下列叙述正确的是（ ）①分子是保持物质性质的一种微粒 ②原子是不能再分的一种微粒 ③有单质生成的反应一定是置换反应 ④生成两种化合物的反应一定是复分解反应 ⑤含有氧元素的化合物一定是氧化物 ⑥由不同种元素组成的纯净物一定是化合物．A．①③④B．②③⑥C．⑥D．④⑤⑥ 查看答案
题型：单项选择题 A1型题 完形填空 My husband and I insisted that our children were old enough to clean their rooms and make their beds. But they thought 1 . My complaints, even self-justified shouting, were always landing on 2 ears. Very often a whole hour's scolding would end with their 3 into tears, I felt very frustrated (沮丧的).I realized I needed to 4 my method of "mothering". One day when they were at school, I spent some time 5 their rooms. On their desks, in plain 6 , I left the cards: "Dear Bill (the other card was 7 to Sarah), your room was messy this morning and I'm sure you like it clean. Love, the Room Fairy." 8 arriving back, the children were 9 excited to receive the little note from the Room Fairy. The next day, their rooms were fairly tidy. Sure enough, there was another note from the Room Fairy 10 for them, thanking them for their nice "gift" of a clean room and 11 asking them to play a certain violin 12 . Each day, thank--you notes would be written differently to keep the ideas 13 . Sometimes the Room Fairy would propose a little 14 : "If you can finish your homework and 15 your lessons before dinner, I' d like to watch a particular television program with you tonight." Sometimes some colored markers or other little items would be left in 16 of well done jobs the day 17 . 18 I can't remember how long "the Room Fairy" continued leaving her love notes. When they were age appropriate, we used various versions of Post-Its(贴条). The bathroom mirror became the 19 centre of our home. Appointments, notices about visiting relatives, lesson schedules, and changes in plans could be posted. We all benefited from and 20 the idea of sharing reminders and daily details of life through notes. I believe the true advantage of the Room Fairy notes survives in our frequent and enjoyable communication.( )1. A. different ( )2. A. side ( )3. A. crying ( )4. A. adjust ( )5. A. to tidy ( )6. A. distance ( )7. A. sent ( )8. A. As ( )9. A. more than ( )10. A. asking ( )11. A. politely ( )12. A. music ( )13. A. respectable ( )14. A. challenge ( )15. A. go with ( )16. A. response ( )17. A. ahead ( )18. A. Actually ( )19. A. life ( )20. A. learned B. no B. deaf B. breaking B. adopt B. tidying B. words B. read B. At B. rather than B. waiting B. friendly B. song B. uninteresting B. question B. look up B. answer B. before B. Even so B. main B. appreciated C. doubtful C. neither C. bursting C. access C. tidied C. speech C. delivered C. In C. no more than C. prayi ng C. gently C. piece C. incredible C. suggestion C. go over C. praise C. over C. Even if C. memory C. shared D. otherwise D. either D. bumping D. addict D. tidy D. sight D. addressed D. Upon D. other than D. expecting D. toughly D. tone D. fresh D. advice D. look into D. honor D. ago D. Though D. reminder D. thanked 查看答案
题型：单项选择题 A1型题 下表是某实验小组所做的“探究滑动摩擦力大小跟哪些因素有关”的实验记录：实验次数接触面的材料压力F/N摩擦力f/N①木块与木板81.6②木块与木板122.4③木块与毛巾125.0（1）分析比较序号②与③的实验数据，可得出的结论是______．（2）分析比较序号______的实验数据，可得出的结论是：在接触面粗糙相同时，压力越大，滑动摩擦力越大．（3）上述研究方法叫“拉制变量法”，下列实验中用到此方法的有______（填序号）．①探究电流与电压、电阻的关系；②探究动能跟哪些因素有关；③探究固体熔化时温度的变化规律；④研究影响电磁铁磁性强弱的因素． 查看答案
ious versions of Post-Its(贴条). The bathroom mirror became the 19