The speaker believes that ______.
A. intelligence can decide future success
B. nerd campers will become extremely successful
C. intelligence can be very important for success
D. intelligence makes it difficult to define success
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The speaker's view towards skipping grade is that ______.
A. smart kids should be allowed to skip grades for further development
B. children should stay within the same group, however smart they may be
C. parents' complaints are important in deciding grade skipping
D. children can skip piano class, but not reading or algebra class
已知某圆管的断面平均流速为1.2m/s,圆管半径r=0.25m,则管内通过的流量 Q=()。
A. 0.158m3/s
B. 0.236m3/s
C. 0.189m3/s
D. 0.258m3/s
竖板自然对流、紊流的表面换热系数与定型尺寸L的关系为()。
A. 与L3成正比例
B. 与L成正比例
C. 无关
D. 与L4与正比例