A:﹣ 2
B:22
C:2
D:﹣ 22
We have a picnic together with our teachers next Thursday.
下图表示( )。
在内燃机工作的过程中,四个冲程中发生内能转化为机械能的冲程是( )
Susan is a top student in our class, so she never _______ an exam.