单项选择题
A.100; B.120; C.150; D.170。
A.0.01~0.02,0.02; B.0.02~0.03,0.04; C.0.03~0.04,0.06; D.0.04~0.05,0.08。
A.焊接连接; B.法兰连接; C.螺纹连接; D.胀接。