烤瓷与合金的结合，下列哪种结合力是最主要的
A．物理结合B．上述均是主要的C．化学结合D．机械结合E．压缩力结合
参考答案：C
用12厘米长的绳子，能围成边长是______厘米的正方形．
Generally speaking, the harder one works, ____________.
A．the better he gets result
B．The better results he gets
C．He gets better results
D．Does he get better results
