建设项目竣工环境保护验收时，空气环境质量测试一般不少于( )天。
A．2 B．3 C．4 D．5
参考答案：B
阳经的交接部位在（）
A.头
B.胸
C.腹
D.背
E.足
—You bought the car about ten years ago?
—Yes. ______ it's old, it still runs well. [ ]
A. Because
B. Since
C. Although
D. But
