问题
单项选择题
铸铁含碳量在2.5~3.5%之间,最高可达到()。
A.4.5%
B.4%
C.5%
答案
参考答案:A
铸铁含碳量在2.5~3.5%之间,最高可达到()。
A.4.5%
B.4%
C.5%
参考答案:A
根据短文内容,用方框中所给单词的适当形式填空,每词限用一次。
Liu Xing, a Junior 2 student, could not understand his teacher and was doing 小题2: in his lessons. He became so worried about it that he started to 小题3: his finger with a knife. A recent report says about 18% of teenagers have mental(心理的) problems. Many students who have problems won’t go for 小题4:or help. Some think they look silly 小题5: they go to see a doctor. Others don’t want to talk about their secrets. |