题目

下列人体细胞中分化程度最低的是                                              A．神经干细胞     B．胚胎干细胞     C．肝脏细胞       D．皮肤干细胞 答案：B 单词拼写： 1.Upon reaching the top of the mountain, a feeling of happiness and a sense of achievement will be ___________(体验). 2.During the test, he showed his __________ (非凡的) memory. 3.Only by hard work can we turn our dreams into _____________ (现实). 4.I was very ___________ (印象) by his performance. 5.He played a ____________ (中心的) figure in a play. 6.Last week, his parents went to London v______ Siberia. 7.We must seize every o___________ to practice our spoken English. 8.Every morning, newspapers are d___________ to each house in time in this area. 9.In that factory, the workshops are m_________ so that the boss can watch what is happening there. 10. He was c_________ of committing theft.