下列不是管路附件的是()。
A.视镜
B.法兰
C.阀门
D.过滤器
参考答案:B
2.6÷(3.4-1.6)
-Is there __________ in today's newspaper?
-Sorry ,__________.[ ]
A. something special ; special nothing
B special something ; special nothing
C. anything special ; something special
D. anything special ; nothing special