下列有关文学常识的表述，错误的一项是(　　)

单句改错每句一处错。每处错误仅涉及一个单词的增加、删除或修改。

     增加：在缺词处加一个漏字符号，并在其下面写出该加的词。

     删除：把多余的词用斜线划掉。

     修改：在错的词下划一横线，并在该词下面写出修改后的词。

①Do you aware that your son is having difficulties at school? ____

②A chair made of steel is stronger than the one made of wood. ____

③I have two sisters, both of them are doctors. ____

④He always thinks it unlikely for his son to be made fun at school. ____

⑤Aismony had an amazing mind which he searched for explanations of everything in the past and the present. ____

⑥Mr. Herpin is one of the foreign experts who is working in China. ____

⑦You'd better set down some time for exercise every day to keep fit. ____

⑧Considered his age, the little boy reads quite well. ____

⑨My grandpa seems to heard of the anecdote about the famous scientist. ____

⑩ I have bought the same dress which she is wearing. ____

①实验室在制备氨气前如何检查装置的气密性？简述操作步骤？ ____

②实验室在用制氢气的简易装置制取氢气前如何检查装置的气密性？简述操作步骤？ ____

图中几何体的左视图是 （     ）