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【简答题】
“腐肉生蛆”是日常生活中常见的现象。甲同学对这个问题有不同的看法，到底谁的观点是对的呢？请你设计一个实验方案，并对结果进行分析。 Ⅰ．请补充完整探究方案： ①把一块鲜肉切成 （填写“相同”或“不同”）大小的两块，分别放在完全相同的两个玻璃瓶里，编号为：A、B。 ②在A玻璃瓶口覆盖纱布，B玻璃瓶口敞开，并把A、B两瓶同时侧放在 （填“有”或“无”）苍蝇出没的适宜条件下。 ③每天观察并记录两个玻璃瓶中肉的生蛆情况。 Ⅱ．实验结果：数日后，A、B两瓶中的鲜肉均腐败，并在B玻璃瓶的腐肉上发现了蛆， A玻璃瓶内则没有蛆。 Ⅲ．实验结论：实验的结果支持了 同学的观点。 Ⅳ．请分析回答： （1）该实验中的变量是 。 （2）导致A、B两个瓶中鲜肉腐败的原因是鲜肉水分充足，有机物丰富， 大量繁殖。 （3）根据所学知识，我们可采用的防止鲜肉腐败的方法有 （请举出一例）。
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反馈参考答案：
举一反三
【简答题】, they decided to get someone else to continue the work . A ． Given out B ． Giving out C ． To give out D ． Give out
【简答题】小题1:I wasn’t s___________________ to hear that he failed his math test 小题2:Would you please tell me something about your studying e________. 小题3:The girl was n_________________ when she heard the ne...
【单选题】I don't know the way. Please ask _ [ ]
A.
anyone else
B.
else anyone
C.
someone else
D.
else someone
【单选题】I don’t know the answer. Maybe you could ask _______.
A.
someone others
B.
anyone else
C.
someone else
D.
else someone
【单选题】The verb 'to lecture' someone doesn't just mean to teach someone. What else can it mean?
A.
to get someone's opinion
B.
to fantasise about someone
C.
to pass on some gossip
D.
to scold someone about someone or something
【单选题】- The book on the desk is Tom's, isn't it? - No, it's _____. [ ]
A.
someone else
B.
someone else's
C.
else someone's
D.
else someone
【单选题】初孕妇，26岁，妊娠40周，宫缩持续40秒，间歇5-6分钟，强度中等，胎心率154次/分，胎头拨露已1小时，无进展，阴道检查无异常，应诊断为
A.
协调性宫缩乏力
B.
不协调宫缩乏力
C.
骨产道异常
D.
胎位异常
E.
胎儿窘迫
【简答题】I failed to pass the exam although I had worked very hard. I should ____________ the causes of my failure.
【单选题】.8 I failed to pass the exam although I had worked very hard. I should __ the causes of my failure.
A.
analyse
B.
analysis
C.
analysing
D.
analysed
【单选题】初孕妇，26岁，妊娠40周，宫缩持续40秒，间歇5～6分，强度中等，胎心率154次/分，胎头拨露已1小时无进展，阴道检查无异常，应诊断为
A.
协调性宫缩乏力
B.
不协调性宫缩乏力
C.
骨产道异常
D.
胎位异常
E.
胎儿窘迫
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