《石油产品残炭测定法（康氏法）》代号是GB/T（）-1987。
A.260
B.262
C.266
D.268
参考答案：D
In a position like this, one can ________ stand up _______ lie down . So it is very uncomfortable.
A．both… and…
B．either… or…
C．neither… nor….
D．not only… but also…
