词汇运用
1．Don't choose a day that you know is going to be ________(有压力的),such as the day
of an exam.
2．They soon ________(适应了) hard work and poor food.
3．Lastly,you can become ________(精神上) addicted.
4．If I can't borrow the money,I shall have to ________(没有也可应付)．
5．We must ________(生产) more food for ourselves and import less.
6．He was ready to ________(冒险) being taken prisoner by the enemy.
7．They were caught selling ________(违法的) drugs.
8．Clearness of ________(陈述) is more important than beauty of language.
9．Practice makes ________(熟能生巧)．
10．He showed excellent ________(判断力) in choosing the wine.
，若A的伴随矩阵的秩等于1，则必有______．