模拟划船(六分钟全力运动)的某些生理学特征

划船运动在我国开展起步较晚,国内在关赛艇的研究自一九八五年起才有零星报道,其测定均是在自行车功率计上进行,因而带有一定的局限性。此外,桨手们在全力划船运动时能量消耗有多大;全力划船运动时其能耗的有氧成分和无氧成分各占多少;目前我国桨手工作能力的生理参数究竟多大等问题亦未见报道。因此,阐明桨手在全力划船时某些生理学特征对赛艇训练和提高我国划船运动的竞技     

奇怪的睡相

对于我来讲,人生不幸事之一便是和弟弟一起睡,因为他一睡觉就变成多动儿。夜半,梦中,又一次经历重物压顶,几经挣扎,忽然醒来。没等睁眼,就已知是弟弟     

西子情浓

(远鲤逊塑隆些丝1 .1 1 1 1 1 176 .767 205 3.5321产碑尸~-场、、户尸一一{一了、、巴︺一了J﹃干」巴口一开一开一0 1 320 1 6 12乏(6台感风,舞,一勺一,·1一雨笑7 .773 2761二二二屯拼二二(气、、}.丫代爪六卜15刻丝丛塑 匹仔; 西子了一、尸代广、、6 1 56.口尸碑‘~、乏.台1 7 6561)一.一一~-一.、6 1 7 65432甲2(5 35胧容二巴之二二二二竺二二二二二二二二二二二1 35西子西子丝l鬓 朦 新比一最展6一认1雨水烟山厂.l’一~、一卜才气一争、2-一乡通里}里鱼里卫矛尸、}了、、7 56}0 1 35碑尹~甲一~、、6 1 56门 ,‘甲6女肴儿佳子子西西柳…     

Comparison study of harmonic imaging (HI) and fundamental imaging (FI) in fetal echocardiography

Objectives: To directly compare the quality of harmonic imaging (HI) and fundamental imaging (FI) in fetal echocardiography and to determine any differences in image quality between the two modalities. Methods: Fetal echocardiograms were performed with the use of FI and HI in 58 fetuses, image quality and visualization of left and right atria, left and right ventricles, mitral and tricuspid valves, aortic and pulmonary valves, left and right ventricular outflow tracts were evaluated and compared between FI and HI. Results: Mean HI scores were higher than mean FI scores (2.73±0.43 vs 2.16±0.69, P<0.001)for all the cardiovascular structures evaluated. Compared with FI, HI improved the image quality and visualization of fetal cardiac structures in subjects with both good (2.73±0.43 vs 2.88±0.32, P<0.001) and suboptimal (1.65±0.41 vs 2.58±0.47, P<0.001) echocardiographic windows. The interobserver correlation coefficient for the grading scores was 0.74 (P<0.001). Conclusions: harmonic imaging enhances and improves the image quality of fetal echocardiography; and has important potential role in cardiac imaging in the fetus.     

宝贝计划·第4月 睡眠失调

婴儿睡眠失调,即包括难入睡、夜间多醒、夜间进食、睡眠周期提前和延迟(即睡得早、醒得早;睡得晚、醒得晚)等。睡眠失调与宝宝的生理、心理和气质特点有关,是自身的特点和外环境,如父母的育儿方式、周围环境扰乱的情况、食物过敏等因素相互作用的结果。     

秋日临海

记忆中的秋游,底片是一片海。海边,黑色的溶岩静静躺在岸上,缝隙间流淌着清澈冰凉的海水,缓慢地浮动着,尽显一世明净悠远,与世无争。忍不住掬     

老师啊,春天

正~~     

母语与外语学习模式的差异对英语教学的启示

母语学习输入程序是听一说一读一写,学习结果是听、说、读、写全面发展。外语学习输入程序是读一写一听一说,学习结果是读写好于听说。这是母语学习与外语学习的本质区别,是两种语言学习的客观规律。本文旨在通过对比母语与外语学习模式的差异,寻找两种语言学习的差异,进而在总结多年英语听力教学的基础上提出若干教学策略,以提高英语教学水平。