下列哪个不是中国六大古都
A.南昌
B.开封
C.西安
D.洛阳
参考答案：A
It is _____ you deal with difficulties that shows _____ you are really like．
A．what; what
B．how; that
C．which; how
D．how; what
测量零件的孔、轴尺寸时，应多测几个点，取（）。
A.最高点
B.最低点
C.中间点
D.平均值
