问题 单项选择题

碳素结构钢钢号Q235A中的“Q"代表()。

A.碳素钢

B.沸腾钢

C.屈服点

D.质量等级

答案

参考答案:C

填空题

读课文,写句子。   

1.能看出“非洲是一个色彩斑斓的世界”的句子有:                                                                          

                                                                                                                                                             

2.课文中首尾照应的句子是:                                                                                                              

                                                                                                                                                             

3.课文中描写的人文景观有:                                                                                                              

                                                                                                                                                              

单项选择题 A1型题