当事人对保证方式没有约定或约定不明确的，按照()承担保证责任的。
A．一般保证
B．特殊保证
C．常规保证
D．连带保证
参考答案：D
下图中大气运动示意正确的是(箭头表示空气运动方向)
A control chart has all of the following characteristics EXCEPT: （）.
A．It illustrates how a process behaves over time.
B．It is used to determine whether or not a process is stable or has predictable performance.
C．It illustrates how various factors might be linked to potential problems or effects.
D．It can be used to monitor any type of output variable.
