北人生而不识菱①者，仕②于南方，席上食菱，并壳入口。或曰：“食菱须去壳。”其人自护所短，曰：“我非不知，并壳者，欲以去热也。”问者曰：“北土亦有此物否？”答曰：“前山后山，何地不有？”夫菱生于水而曰土产，此坐③强不知以为知也。

【注释】①菱：俗称菱角，水生植物，果实可以吃。②仕：做官。③坐：因为。

按注音写词语。

    William Henry Harrison, the ninth President of the USA, was born in a small town. When he was a boy, he was very quiet and shy. Because he was so quiet, everyone thought that he wasn't bright. People in the town often put a nickel(五分镍币)and a dime(十分硬币)before him and asked him which to choose. He always chose the nickel and they laughed.

    One day a woman felt sorry for him. She asked, "Why do you never take a dime and always choose a nickel? Do you know a nickel is worth(值……钱) much less than a dime?"

    "Certainly I know it.” William answered slowly. "But if I choose the dime, they will not ask me to choose them any more.”

①Do you know why Jenny ran ____ out of the room?

②The baby is too young to look after____.

③I got up too early and  I'm feeling very ____ now.

④My brother ____ his leg when he fell off the bike.

⑤This flower sends out one kind sweet ____.

为了测盐水的密度，某实验小组制定如下的实验计划：

①在烧杯中装入适量盐水，测出它们的总质量   ②测出空烧杯的质量

③测出量筒中盐水的体积             ④测出烧杯和剩余盐水的质量

⑤将烧杯中一部分盐水倒入量筒中     ⑥根据实验数据计算盐水的密度

以上实验步骤安排最合理的是（　　）