Tony:Iced tea,please. 3
第1题:
Two mineral water, please.()
第2题:
What is your present address? May I ask your present address? Tell me your present address, please.
第3题:
EDI组件给水总可交换阴离子(TEA,以CaCO3计),TEA的控制指标为()。
A<25mg/L
B≤25mg/L
C<50mg/L
D≤50mg/L
第4题:
A、transformed
B、transplanted
C、transferred
D、transmitted
第5题: