-- Hello.How are things ?-- _____A.They are too expensive .B.I'm not doing anythi
-- Hello.How are things ?
-- _____
A.They are too expensive .
B.I'm not doing anything right now .
C.Oh,not so bad,John.
D.It's interesting ,isn't it?
-- Hello.How are things ?
-- _____
A.They are too expensive .
B.I'm not doing anything right now .
C.Oh,not so bad,John.
D.It's interesting ,isn't it?
A.Nothing much
B.Fine, thanks.How about you?
C.I’m pleased to meet you
D.I’m fine, thanks
A.轻度危害(Ⅳ级):THI<35<br>
B.中度危害(Ⅲ级):THI≥35~<50<br>
C.高度危害(Ⅱ级):THI≥50~<65<br>
D.极度危害(工级):THI≥65
A.13 TLi的低5位(高3位未用)和THi的8位组成
B.13 THi的低5位(高3位未用)和TLi的8位组成
C.16 TLi的8位和THi的8位组成
D.8 TLi的8位
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