【判断题】L是从点A(3,3)到点B(1,2) =4。
【单选题】When seeking to appoint new members to a corporation's board, the chairs traditionally looked for candidates who
A.
had legal and governmental experience.
B.
had experience dealing with community affairs.
C.
could work easily with other members of the board.
D.
were already involved in establishing policy for that corporation.
【判断题】L是从点A(3,2/3)到点B(1,2) =4。
【单选题】It can be inferred from the passage that, when seeking to appoint new members to a corporation's board, the chair traditionally looked for candidates who______.
A.
had experience dealing with community affairs
B.
could work easily with other members of the board
C.
were already involved in establishing policy for that corporation
D.
had influential connections outside the business world
【单选题】明成祖朱棣在位时期曾五次北征蒙古,与此同时,他还在黑龙江流域设立了奴儿干都司,先后派亦失哈5次巡视奴儿干,招抚女真各部。结合下面表格,据此可得出的历史结论是 朱棣五次北征蒙古时间 亦失哈五次北巡奴儿干时间 永乐8年2月出发 永乐9年春出发 永乐12年3月出发 永乐10年冬 永乐20年3月出发 ...
【判断题】某发光二极管,两引脚一个长,一个短,则长引脚对应发光管的阴极。
【简答题】证明A=(2xy+3)i+(x 2 -4z)j-4yk为保守场,并计算曲线积分 其中l是从点A(3,-1,2)到点B(2,1,-1)的任意路径.