下列各句中，没有语病、句意明确的一项是(　　)

（2015•广东佛山）阅读下面短文，用所给单词的恰当形式填空，使短文通顺、合理。每词限用一次，有一个多余的选项。

                                    information   find   if   million   serve   try   whether   power

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当光从水里斜射到空气中时    (    )

不同纬度的地方，纬线长度是不同的。下列纬线圈中长度最长的是（　　）

（1）只用一种试剂（可加热）就可区别下列五种无色液体：CH₃CH₂CH₂OH、CH₃CH₂CHO、HCOOH、CH₃COOH、CH₃COOCH₂CH₃，该试剂可以是 ____．

（2）①     ②CH₂=CH₂③CH≡CH     ④⑤    ⑥     ⑦CH₃CH₂CH₂CH₂Br

上述有机物中（填写上述物质的序号）

①属于芳香烃的是　 ____　；

②能与溴水发生加成反应的是　 ____　；

③能发生消去反应的是　 ____　；

④能与NaOH溶液反应，但不能与Na₂CO₃溶液反应的是 ____