【简答题】快题训练(4.16) (1)自由的色彩组合表达,用撕纸的方式为自己完成一张自画像。 要求: 1画幅尺寸与构图方式不限; 2将个人照片(胸颈部以上)彩色打印然后,粘贴在完成作业纸张的背面; 3两课时内完成;
【单选题】____ finishing his homework, he went to play basketball.
【单选题】_________ his work , he can’t play with his friends.
【单选题】In his effort to prevent his company from _____, he worked to his limit, thus _____. [ ]
A.
breaking down; breaking down his health
B.
closing down; broke down his health
C.
closing down; his health broke down
D.
breaking down; his health breaking down
【单选题】Jim spent half an hour ______his work.
【简答题】(装载问题)设有1辆载重量为10 t的卡车,用以装载3种货物,每种货物的单件重量及单件价值如表8.3.1所示。问各种货物应装多少件,才能既不超过总重量(以吨为单位计)又使总价值最大。 设xj表示装载第j种货物的件数(j=1,2,3),则问题可归结为 max z=4x1+5x2+6x3 这是一个整数规划问题。下面用动态规划方法来解。
【单选题】Tom spent two years _________ his book.