以下不属于我国特有珍稀动物的是[ ]
A．扬子鳄
B．熊猫
C．白鳍豚
D．珙桐
答案：D
I was about to give up my effort to work on the puzzle when a good idea _____ me. [ ]
A. beat
B. struck
C. attacked
D. caught
利用中间件Middleware的高层 【19】 可以将底层网络协议与实现技术隔离开来，使得程序员可以将精力集中在应用软件编程上。
about to give up my effort to work on the puzzle when a good idea _____ me. [ ]