信任度低的人的沟通视窗的特点是（）
A.公开区信息量最大
B.盲区信息量最小
C.隐藏区信息量最大
D.未知区信息量最小
参考答案：C
With the development of high technology, more and more new things ______ in the past years.
A．discovered
B．have discovered
C．had been discovered
D．have been discovered
In summer milk will quickly go bad_____ it is put into a fridge.
A．though
B．unless
C．because
D．once
