常量氧分析方法如何选择?
参考答案:
常量氧分析方法操作为LoadMETHON此方法为外标定量方法,每次定量时应重新校正。
— Do you feel sad and hurriedly give some money when seeing beggars on the street?
— Absolutely not! I think they are _______ cheats.
A.nothing but
B.anything but
C.something like
D.anything like
普通黄铜分为单相黄铜和()两类
A、多相黄铜
B、复杂相黄铜
C、复相黄铜
D、双相黄铜