手工编程是指所有编程加工程序的全过程，即图样分析、工艺处理、数值计算、编写程序单、制造控制介质、程序校验可用电脑来完成。
参考答案：对
George would certainly have attended the meeting，__________.
A．if he didn’t get a flat tire
B．if the flat tire hadn’t happened
C．had he not had a flat tire
D．had the tire not flattened itself
长日照花卉是指生长、开花需要14小时以上的光照长度的花卉。
