片剂薄膜包衣用材料包括
A. 糖浆
B. 高分子包衣材料
C. 致孔剂
D. 增塑剂
E. 川蜡
1.Who are the clubs open to?2.How many clubs can a student join?
What does the passage talk about?It talks about________ .
A. use of the Internet
B. the number of the students
C. American school clubs
D. students' free-time activities in China
数控机床中,转速功能字S可指定( )。
A. m/min
B. r/min
C. mm/min
D. mm/s