手机稳压块上标明“28P”,表示输出电压是()V。
A、2.8;
B、28;
C、0.28;
D、280。
参考答案:A
周长是20厘米的正方形,边长是( )厘米。
Harsh ________ his words may be, they will do us a lot of good. [ ]
A. although
B. even if
C. as
D. now that