集群控制器
参考答案：
由一通讯终端控制器统一控制一群终端计算机，所有的消息皆凭借该控制器作为缓冲并传送至接受器。
Speaker A : Thank you so much for the wonderful dinner. Tom and I really enjoyed it.
Speaker B: ()
A. I’m glad you made it.
B. You’re quite welcome.
C. I like to share with others.
D. You’re always my best friends.
实心砌体结构一般灰缝厚度应控制在（）
A.5mm~8mm
B.8mm~10mm
C.12mm~15mm
D.8mm~12mm
