选择句子中“拥”字的正确解释,把选项填在横线里。
拥:A抱 B围着 C挤着走 D拥护
①一百多号人你拥我挤地往南跑。____
②木桥前站着的是全村人都拥戴的老汉。____
③那两个老人紧紧地拥抱在一起。____
④一群青年拥着一位老师傅走了出来。____
Fe2+的检验:
(1)常用:先滴加硫氰化钾溶液,观察后,再加氯水:现象:____ ;
化学方程式:①____ ;②____ ;
离子方程式:①____ ;②____ ;
(2)高浓度时可以加氢氧化钠溶液:现象:____;化学方程式:①____ ;②____ ;
(3)当Fe2+和Fe3+共存时,用酸性高锰酸钾,现象是____ 配平离子方程式:Fe2++MnO4﹣+H+=Fe3++Mn2++H2O____ .
注意:每个句子均有1处语言错误。错误仅涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。
删除:把多余的词用(\)划掉。
修改:在错的词下画一横线,并在该词下面写出修改后的词。
注意:1)每处错误及其修改均仅限一词。
2)只允许修改10处,多者(从第11处起)不计分。
为了研究蚂蚁对金合欢的影响,某生物兴趣小组的同学进行了实验探究,并得到了如表所示的实验结果,请据表分析,下列说法正确的是( )
金合欢幼苗的生长情况
①号没有蚂蚁栖居的金合欢
②号有蚂蚁栖居的金合欢
10个月的存活率/%
43
72
幼苗生长的
高度/厘米
3月25日至4月16日
0→6.2
0→31.0
4月17日至6月3日
6.2→10.2
31.0→72.9
Sailing Welcome to our TV show On the Go. Today we are going to talk about an exciting sport—sailing. First let’s talk to Sue,an 18yearold girl who loves sailing.Host: When did you start sailing,Sue?Sue: I started sailing when I was 15 years old.Host: Is it a difficult sport to learn?Sue: Yes,it is more difficult than any other sport. For example,you need to learn about the wind directions(方向) and how to move the sails in the right way.Host: How often do you go sailing?Sue: I go sailing with my father every weekend.Host: How far do you go sailing?Sue: It depends on the wind.Host:OK. Thank you,Sue. Good luck with your sailing.Are you interested in sailing after hearing the interview?If you want to learn sailing,here is a chance for you .The Water Sports Center will organize sailing lessons. Each lesson will cost you ¥20 and there are 5 lessons altogether(总共).