初孕妇，26岁。妊娠38周，主诉肋下有块状物。腹部检查：子宫呈纵椭圆形，胎先露部较软且不规则，胎心在脐上偏左，本例应诊断为（）
A.枕先露
B.面先露
C.臀先露
D.肩先露
E.复合先露
参考答案：C
解析：若为枕先露，则胎先露部较硬且为圆形，故A不正确。若为面先露，先露部不规则，胎心在脐下，故B不正确。若为肩先露，则子宫呈横椭圆形，先露部为胎肩，故D不正确。若为复合先露，则见胎儿头先露或臀先露与胎手或胎足同时入盆，故E不正确。子宫呈纵椭圆形，胎先露部较软且不规则，胎心在脐上偏左，应考虑为臀先露。故C正确。
What is the relationship between the foreign firm affiliates and local firms in the country
A．The foreign firm affiliates are developing as rapidly as other local firms.
B．The foreign firm affiliates are not developing as rapidly as other local firms.
C．The foreign firm affiliates in this country have significantly enhanced the technological upgrading of local firms.
D．The foreign firm affiliates in this country have hardly exerted any positive influence on the technological progress of local firms.