投资项目的( )由银行特派员与项目执行机构以及借款人共同完成。A．评估报告B．竣工

阅读下面短文，并借助上下文和插图补充所缺信息。每个空只能填写一个形式正确、意义相符的单词。

     One day my uncle was (1)______ a newspaper and learned that (2)______  were our friends. We should

get (3)______  well with them. He looked at his nice bird in the cage, and decided (4)______  let it fly back

home nature. He took the cage with the bird in it and went to a little hill near his house by (5)______. He

(6) ______ the door of the cage, and the bird (7)______  away quickly. Seeing this, my uncle felt very happy.

He went home with the empty (8)______. When he got back, he sat in a chair and (9)______  a rest. A

moment later , to his (10)______, he found the bird back in the cage.

在“研究匀变速直线运动”的实验中所使用的电源是50Hz的交流电，某同学打好三条纸带，选取其中最好的一条，其中一段如图所示．图中A、B、C、D、E为计数点，相邻两个计数点间有四个点未画出．根据纸带可计算出各计数点的瞬时速度，则B点的速度v_B=______m/s，并计算纸带所对应小车的加速度a=______m/s²（本题结果均要求保留三位有效数字）

消化系统肿瘤转移至肝脏的主要途径是

A．门静脉

B．肝动脉

C．肝静脉

D．胆管系统

E．下腔静脉

锅炉表面排污可起的作用是（）。

A．清除锅水中油污和表面漂浮物

B．减少锅水含盐量

C．清除锅水中泥渣

D．A和B

黑热病患者死亡的原因是（）.

A.免疫复合物引起的变态反应

B.脾功能亢进

C.骨髓造血功能的下降

D.由于白细胞减少，机体抵抗力降低，易并发各种感染疾病

E.免疫溶血引起的红细胞减少