下列哪些储能系统适用于电力系统调峰?()
A.中小型电池储能系统
B.大型电池储能系统
C.抽水蓄能
D.压缩空气储能
参考答案:B, C, D
把14分成两个质数相加是14=______+______;把14分成两个质数相乘是14=______×______.
-Young man, come off the grass; we forbid________ on the grass here.
-Sorry, I didn’t notice it.
A.to stepping
B.stepping
C.why
D.which