1640年查理一世召开议会的目的是_________________。
筹集军费, * * 苏格兰人民起义
— Must I five the dictionary back to the library now?
— No, You _____. You can _____ it for another two weeks. [ ]
A. needn't, know
B. needn't, keep
C. mustn't, lend
D. mustn't, keep
某个电脑用户计划使用不超过1 000元的资金购买单价分别为80元、90元的单片软件和盒装磁盘.根据需要,软件至少买3片,磁盘至少买4盒,写出满足上述所有不等关系的不等式.