严禁甩掉保护装置或擅自调大整定值，或用不能熔化金属代替（）。
参考答案：保险丝
My mother asked me to go shopping yesterday. In this sentence" to go shopping" is_____．
A．Object
B．Predicative
C．Adverbial
D．Object complement
简要说明对植物整形修剪的目的与作用。
