中东地区是一个多民族聚居区，其中人数最多的是： A．犹太人 B．阿拉伯人 C．因

新概念英语填空

小题1:Many villagers believe that the tree has already __________ a number of victims.

小题2:As the neighbors ________ ______ the noise, my husband spent weeks training him to press his paw on he latch to let himself in.

小题3:After I had given her some money, she _______ ________ a crystal ball and said: “ A relation of yours is coming to see you….”

小题4:NASA is now going to ________ the telescope ______, so it will soon be sending up four astronauts to repair it.

小题5:_______ _______ ________ you read this, the Hubble’s eagle eye will have sent us thousands and thousands of wonderful pictures.

小题6:Winter was coming on and the hills threatened the surrounding villagers with ________.

小题7:The seed was sprayed over the ground _____  _________ __________ by aeroplanes.

小题8:By then, however, in many places the grass had already _______ _________.

小题9:In 1860, a better plan was ______ _________ by an Englishman, William Low.

小题10:It was officially opened on March 7, 1994,finally _________ Britain to European continent.

以下哪些参数须在运用呼吸机前设置（）

A.呼吸频率

B.每分钟通气量

C.给氧浓度

D.吸呼时间比

E.气道压力

一个空心金属球的质量是0.5kg，体积是6×10^-4m³，将它投入水中静止时，下列说法中正确的是（g取10N/kg）[ ]

A．金属球漂浮，F_浮= 5N

B．金属球漂浮，F_浮= 6N

C．金属球悬浮，F_浮= 5N

D．金属球沉底，F_浮= 6N

在坡屋面上行走时，要面向屋脊或斜向屋脊，防止滑倒。 ( )

声束通过一介质后，其振幅和声强的降低称为

A．吸收
B．衰减效应
C．衰减
D．声阻抗
E．失落