下列文学常识的表述有误的一项是（    ）

两个完全相同的物块A、B，质量均为m=0.8kg，在同一粗糙水平面上以相同的初速度从同一位置开始运动．图中的两条直线分别表示A物块受到水平拉力F作用和B物块不受拉力作用的v﹣t图象，求：

阅读课文《小草和大树》片段，完成相关练习。

她们的路子走对了！她们硬是用钢铁般的意志敲开了文学圣殿       的大门，硬是用汗水和心血把“小草”浇灌        成“大树”。她们庄严        地向传统的观念和陈腐         的偏见宣战       ：世界上不存在什么“不是妇女的事业”。

为探究电磁铁的磁性与哪些因素有关，小丽所在实验小组通过交流与合作设计了以下实验方案：用漆包线（表面涂有绝缘的导线）在大铁钉上绕若干圈，制成简单的电磁铁．如图所示的a、b、c、d为实验中的四种情况．根据小丽的猜想和实验，完成下面填空：

（1）在实验中小丽是通过观察比较____ 来判断电磁铁磁性强弱的．

（2）通过比较____ 、____ 两种情况，可以得出的结论是：电磁铁磁性的有无与电流的有无有关（选填“a”、”b”、“c”或者“d”）．

（3）通过比较 b、c两种情况，可以得出的结论是：____ 

（4）通过比较d中甲、乙两电磁铁，可以得出的结论是：____ 

阅读下面短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    Body language is one of the most powerful ____(mean) of communication, often even more powerful ____spoken language. People around the world show many kinds of feelings, wishes and attitudes that they might never speak aloud. ____ is possible to "read" others around us, even if they do not intend for us to catch their ____(speak) communication. Of course, body language can be misread, ____ many gestures and actions are universal.

    The most universal ____(face) expression is, of course, the smile- its function is to show happiness and put people at ease. It does not always mean that we are ____(true) happy, however. Smiles around the world can be false ____(hide) other feelings like anger, fear or worry. There are unhappy smiles, such as when someone" _____ (lose) face" and smiles to hide it. However, the general purpose of smiling is to show good ____ (feel).