【单选题】遇到估算时间距开工时间较远的项目,应以( )为基准年,按照近年的价格指数将编制的静态投资进行适当调整,否则就会失去基准作用,影响投资估算的准确性。
【简答题】将小鼠胚胎干细胞定向诱导分化成M细胞再移植到糖尿病模型小鼠(胰岛细胞被特定药物破坏的小鼠)体内,然后小鼠的血糖浓度恢复到正常水平。请回答相关问题: (1)实验用的胚胎干细胞是从小鼠胚胎的囊胚内细胞团或___________中分离的,取出后一般用____________将其分散成单个细胞。 (2)根据实验结果可以判定M细胞已具有胰岛B细胞的功能。说明判定的理由_____________。 (3)若将...
【单选题】Directions: Choose the one that best completes the sentence, or fully expresses the meaning of the given word. Doubtless some instinct impels me gluttonously to cram these the last weeks of my life wi...
【单选题】What can we infer from the last sentence in Paragraph 2?
A.
Dad ate too much food as a pig.
B.
Dad praised me for the new recipe.
C.
Dad refused the meal prepared according to a new recipe.
D.
Dad thought the food was too much for him.
【判断题】直流电动机反接制动的原理实际上是与直流电动机的反转原理一样的。