AAS法测定钙时，加入2%镧盐溶液，其目的是消除（）

A.化学干扰

B.物理干扰

C.电离干扰

D.背景干扰

It is permissible to place an eye splice in wire rope used as cargo gear providing the splice is made using（）.

A.two tucks with whole strands and one tuck with one-half strand

B.three tucks with whole strands and two tucks with 1/2 the wire cut from the tucking strand

C.three tucks with whole strands

D.two tucks with whole strands and three tucks with half strands