题型：问答题 简答题 正常人体内的造血干细胞能分裂产生备种血细胞，离体时在某些因素的诱导下，却可以分化为神经细胞和肝细胞。其根本原因是这些造血干细胞[ ]A．有旺盛的分裂能力B．还没有分化C．能合成神经细胞或肝细胞需要的蛋白质D．具有与受精卵相同的全套遗传信息 查看答案
题型：问答题 简答题 完形填空。 KFC used to be very popular. Many people waited in a long 1 to buy food there. But these days, fewer people eat there 2 it's reported that some foods are dangerous. The 3 comes from Sudan l. It can make people more likely get cancer. So far, Sudan l has been found to be in five of KFC's foods. Sudan l is a reddye (染料). People use it to colour oils, but it should never 4 make food. Last week, health officials asked KFC to stop selling its food 5 Sudan l. Only after they pass inspection can they sell it again. 6 you ate some of the five foods last week, don't worry too much. The chance of getting cancer is very 7 as only a little is used in foods. ( )1. A. group ( )2. A. why ( )3. A. danger ( )4. A. used to ( )5. A. with ( )6. A. When ( )7. A. small B. line B. but B. problemsB. be used B. has B. Whether B. hard C. time C. because C. quarrel C. be used toC. without C. Since C. light D. row D. so D. troubleD. used D. have D. If D. large 查看答案
题型：问答题 简答题 —Does your father often live _________ you, Jim?—No, he isn't _________ home. He often goes to England. [ ] A. in; atB. with; atC. with; inD. with; / 查看答案
