问题 填空题

为防止计算数据不准确而使制作出的盲板直径偏大或偏小,在测量中,要注意管道表面有无障碍或积灰积油,管道有无()等。

答案

参考答案:变形

材料题

阅读下列材料:

       近代以来,面对外敌入侵,中国人民进行了前赴后继的英勇抗击。在抗击外敌的战场上,涌现出一个又一个英雄人物,如林则徐、左宗棠、邓世昌、黄继光、邱少云……他们可歌可泣的事迹被载入了史册,并将永远激励后人,启迪后人。

(1)总结历史,完成表格。

                                                                                                                                                           

(2)在近代史上抗击外敌的事件中,中国军队往往付出重大代价,却大多以失败告终,你认为其原因有

    哪些?

                                                                                                                                                            

                                                                                                                                                            

(3)当今世界仍不太平,我们要居安思危。请综合上述问题,谈谈怎样才能取得抗击外敌入侵的胜利。

                                                                                                                                                            

                                                                                                                                                            

问答题 简答题