【判断题】失智老年人独自外出时需要为其准备身份识别卡,或定位表等装置,以便失智老年人外出迷路,及时向路人寻求帮助之用
【单选题】–You’ve given us a wonderful dinner, Mrs Wang. --______.
A.
Oh, I’m afraid I didn’t cook very well
B.
I’m glad you enjoyed it
C.
Come again when you are free
D.
It’s not necessary for you to say so.
【简答题】在匀强磁场 中,取一半径为 R 的圆,圆面的法线 与 成 60° 角,如上图 3 所示,则通过以该圆周为边线的如图所示的任意曲面 S 的磁通量 。(曲面 S 的法线向外为正向)
【单选题】---You’ve given us a wonderful Chinese dinner, Mrs. Huang. --- ______.
A.
Oh, I’m afraid I didn’t cook well
B.
I’m glad you enjoyed it
C.
It’s not necessary for you to say so
【单选题】— You’ve given us a wonderful English dinner, Mrs.Smith. — ____.
A.
Oh, I’m afraid I didn’t cook very well
B.
I’m glad you enjoyed it
C.
Come again when you are free
D.
It’s not necessary for you to say so
【单选题】如图所示,圆环的半径为R,与纸面平行,在圆环的圆心的半径为r的虚线所围成的圆面积内,存在垂直纸面向外的匀强磁场,其余部分磁场方向垂直纸面向里,磁感应强度均为B,则穿过圆环的磁通量为 ( )