滚铝的外观特征是什么?
参考答案:
由于铝液的波动,外观上表现为电压摆严重,电压摆在500mV以上,火苗时冒时回,同时在槽壁上可以观察到泛上来的铝水,有时会听到响声。
--- Journalists have to work very quickly in order to_______.
--- I know. I like that. It’s very challenging.
A.meet their deadlines
B.earn a high salary
C.avoid being fired
D.make both ends meet
大豆制品中尿素酶活性的测定(仲裁法)适用于大豆制得的产品和副产品中()的测定,也可确认大豆制品的湿热处理程度。
A、抗胰蛋白酶
B、尿素酶活性
C、抗营养因子
D、蛋白质