【单选题】(定积分的计算分部积分)设积分 ,则( )
【单选题】依据发生部位的不同,临床上最为常见的心内膜炎是
【单选题】The word 'handicapped'(paragraph 1) might mean______.
【简答题】设积分区域G:x^2+y^2+z^2≤R^2,则三重积分 在柱面坐标下的累积分为 ( )
【单选题】The best phrase that summarizes the main idea of the text is ______.
A.
handicapped students and their problems
B.
computer assisted teaching programs
C.
videodisc and special education
D.
normal children and handicapped kids
【单选题】The best kind of handshake is ______.