They had bought ______ furniture before they moved into the new apartment.

A． many

B． few

C． lot of

D． some pieces of

点固焊应与正式焊要求相同，采用直流正接法，并采用高频引弧装置。点同焊位置应在不影响视线便于操作处，长度不超过10mm，厚度不超过（）mm。

A.2

B.3

C.5

D.8