读图回答：
2012年和2016年的夏季奥运会分别在英国伦敦(51°30′N，0°7′W)和巴西的里约热内卢(22°54′S，43°12′W)举行，下面甲乙两图分别是当地的气候资料统计图。据此完成下面小题。
用石墨作电极，电解1 mol/L下列物质的溶液，溶液的pH保持不变的是（ ）
Look at the ads(广告). You may find something you need.
Xinxing travel agency.
Five-day trip to Zhangjiajie.
By train.
five-star hotel.
Call Miss Li at 5678-9324 for more information.
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Music teacher.
Good at teaching kids from 5 to 10 years of age.
Call Mary at 8769-9870.
Babysitter(临时保姆) wanted.
A 2-year-old baby.
At my home.
From 8: 00am to 5: 00 pm.
A lady who is less than 45 years old.
Be kind to kids.
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下列有关动物生殖、发育的叙述中，不正确的是（ ）
