什么是新闻受众的心理承受力?如何提高新闻受众的心理承受力?
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关于子宫内膜的说法正确的是()
A. 月经期子宫内膜全层脱落
B. 子宫内膜基底层有周期性变化
C. 表面1/3为功能层,下2/3为基底层
D. 表面2/3为功能层,下1/3为基底层
E. 表面1/2为功能层,下1/2为基底层
A polyconic projection is based on a ().
A. plane tangent at one point
B. cylinder tangent at one parallel
C. cone tangent at one parallel
D. series of cones tangent at selected parallel