软件危机出现于60年代末,为了解决软件危机,人们提出了【 】的原理来设计软件这就是软件工程诞生的基础。
参考答案:软件工程学
根据所给句子的意思,填上合适的单词,并注意其正确形式,首字母或中文已给出。
小题1:There is no indoor swimming-pool in this school and the students often go to swim o_________.
小题2:Sorry, I can’t go with you. I’m s ______ from a serious headache.
小题3:Believe it or not, my old school friend has changed so much that I can’t r____________ him.
小题4:I can’t express how g_______________ I am for what you’ve done for me.
小题5:Although she is Chinese, she can speak English and French _________ (流利地).
小题6:Many young men ______________ (不同意) with their parents on most things because of the generation gap.
小题7:Walk two _____________(街区), and you’ll find the super market at the corner.
小题8:Never tell him a secret, because he has got a (松的)tongue.
我国周边安全环境面临哪些主要威胁?