There a knife and fork on the table.
A.seems to be
B.seem to be
C.is seeming to be
D.are
A
将年经营费用乘以项目的投资回收期,再加上总投资即为总计算费用。()
火焰加热矫正时,加热点的直径不应小于()毫米。
A.15
B.20
C.30
D.40