全色谱电缆中的扎带色谱没有（）。
A、白蓝
B、黑棕
C、紫棕
D、紫灰
参考答案：D
When an economy is in an economic expansion, automatic stabilizers will tend to alter government spending and taxation so as to:（）
A. ensure that the budget will remain in balance.
B. reduce the budget deficit (or increase the surplus).
C. enlarge the budget deficit (or reduce the surplus).
C语言中错误的int类型常数是( )
A．123
B．1F7
C．038
D．OxAF
