鸡胸和漏斗胸多见于
A.3~4个月B.4~6个月C.8~9个月D.1岁左右E.3岁以后
参考答案:D
单句改错(共10小题,每题1分,共10分)
小题1:This particular sad event left a deep impression on Pliny.
小题2:With so many different forms of poetry to choose, students may eventually want to write poems of their own.
小题3:It is the forms of people who were caught in the disaster that made the city a monument of human history.
小题4:It was the first time that Helen understood such a complex word.
小题5:He yelled the young girl so that the passengers waiting in line behind him could hear.
小题6:With Helen’s knowledge and vocabulary expanded, she asked more questions.
小题7:I thought that strange that my teacher could not show me love.
小题8:The word think was also a difficult one but she had a breakthrough while worked on a simple task.
小题9:My parents are classical musicians and they named me as a famous violinist.
小题10:In other words, doctors need to achieve balance between being an authority figure and being a friendly human being.
花生是人们常吃的一种食品。花生果壳内的种子(即花生仁)有大有小,颜色也有深红、浅红之分,这与其品种及种植的土壤有关,请回答:
(1)花生的种子是由花的__________发育来的。
(2)花生仁富含脂肪和蛋白质,其中的______________可以为人的生长发育及受损细胞的修复和更新提供重要原料。
(3)根据花生的结构可以判断花生属于__________(裸子/被子)植物。
(4)如果将大花生种植在贫瘠的土壤中,结出小花生,这种单纯由环境引起的变异__________(能/不能)遗传给后代。