I a book.[ ]
A. reading
B. am read
C. am reading
答案：C
The chair is made_____wood and the paper is made _____wood,too
A．of;of
B．from;of
C．of;from
D．from;from
简述柴油机进、排气阀槽臂脱槽和导杆折断时的查找方法？
