用百分表量出工件两端的高度差，若高度差不在公差范围内，说明工件锥度合格。
参考答案：错
_______ the necklace borrowed from her friends made her ______ completely.
A．Losing; upset
B．To lose; to be upset
C．Losing; upsetting
D．Lost; upset
派生类对基类的继承有三种方式：______、______，保护继承。
