70×t=70t（千米）；
答：客车行了70t千米；
故选：C．
阅读短文，判断句子是(Y)否(N)正确 。
My name is Zhang Li. This is Jack. He is an English boy. He is nine. His father is a teacher. His mother
is a teacher, too. She teaches (教) us English. She is a good teacher. Jack is my good friend. We go to school
together every day (每天).
( ) 1. Jack is Zhang Li's good friend.
( ) 2. Jack is 12.
( ) 3. Jack's father is a teacher.
( ) 4. Jack's mother is Zhang Li's English teacher.
( ) 5. Zhang Li and Jack go to school together.
( ) 6. Zhang Li is nine years old.
王某，男，35岁，口腔卫生良好，无龋齿及牙周疾患。第一磨牙中性关系，颊向，上颌可用间隙92mm，必需间隙95mm，下颌牙列平齐，余正常。
正确的诊断是（）
A.安氏Ⅰ类错，毛氏Ⅰ类1分类
B.安氏Ⅰ类错，毛氏Ⅰ类2分类
C.安氏Ⅰ类错，毛氏Ⅴ类
D.安氏Ⅰ类错，毛氏Ⅵ类
E.正常
颊向，上颌可用间隙92mm，必需间隙95mm，下颌牙列平齐，余正常。
，毛氏Ⅰ类1分类