--- Are you the same weight as Tom?
--- No, I am not _____ Tom.
A:as same heavy as
B:as same as
C:so heavy as
D:the same heavy as
给你天平、刻度尺、一盒大头针、一本书,你能做下列哪些实验( ____ )
A、测一个大头针的质量. B、测一张纸的质量. C、测大头针的密度. D、测纸的密度.
观察下列漫画并回答问题
结合漫画,回答问题
单项式-2xy的系数是 ____,次数为____.