—Let's go to watch the cosplay show!—Sorry, I . I have to go to my guitar lesson.
A:shouldn't
B:mustn't
C:needn't
D:can't
俗话说“大树底下好乘凉”、“千里之堤,毁于蚁穴”体现了( )
﹣12015的相反数是( )
写出近义词。
启发—____ 姿态—____ 本质—____
一台单缸四冲程汽油机,它的转速是800r/min,做功冲程中燃气推动活塞一次做功1500J,那么这台汽油机的功率为( )