【简答题】设积分区域D:x^2+y^2≤4,则二重积分 化学极坐标下的二次积分为_________.
【简答题】设积分区域 ≤R^2,0≤z≤1,则三重积分 ( )
【判断题】In America, they like a firm handshake.
【简答题】What may a firm grip (handshake) show?
【简答题】设积分区域B:x^2+y^2≤2x,则二重积分 ( )
【单选题】Always use a firm handshake____________________________ .
A.
when you shake hands with an Italian
B.
when you shake hands with a British
C.
when you shake hands with a French
D.
when you shake hands with an American
【简答题】A firm handshake is key to interview success. As any serious job-hunter knows, it helps to dress smartly and smile at that all-important interview. But research has showed that a firm handshake is wha...