食品中亚硫酸盐的定量测定,通常采用盐酸副玫瑰苯胺法。( )
参考答案:对
—Please sit down and have a break. You have been working on this machine nonstop for two hours.
—No, thanks. .
A.I’m not in the least tired
B.I’m too tired to move
C.I’m not a little tired
D.I’m a bit tired
灭火人员要做好自我防护准备,各单位要保持通讯畅通。