题目

根据短文内容，从方框中选择恰当的单词，并用其适当形式填空（有两词多余）。 finishclassescool freemusic favoritehour Mondaylast reallyChinese Because Tim is a studentat No.5 Middle School. He is in Class One. It's . It's a really busy day. Tim goes to schoolat 7: 30 a. m. He has four in the morning. The first class is Chinese. Itstarts at 8: 00 a. m. Tim likes . He thinks it's very interesting. AfterChinese, he has math. Math is Tom's subject. Why? he thinks it'svery useful. Then he has . It's relaxing. The class in the morning isscience. Tim doesn如图11所示为上海自主研发的氢燃料车，它的核心技术已跻身于世界先进行列。该车使用氢气代替汽油，在高压条件下，应用体积为0.16米3的储氢罐储存2千克的氢气，一次加气可行驶230千米，最高速度可达122千米/小时。该车整车质量为1600千克，若每个轮胎与地面的接触面积为4×10-2米2求：（1）储氢罐中储存的氢气密度；（2）该车对地面的压强。