阅读短文,用动词的适当形式填空。

    My name is Tony. I      1         (have) a big family. There are many people in my family. They     2      

(be)my grandfather, my grandmother, my parents, my sister and I. I haven't got any brothers. I       3      

(study) in a school in Beijing. It's very big. There are many students in our school. In front of(在……的前面 )our classroom there is a blackboard. We can     4      (write) on it. There are forty desks and chairs

in our classroom. Miss Li is our teacher.There is a computer on Miss Li's desk. But there     5     (be not)

any computers on our desks.I love my family. And I love my school and teachers.

输油管道采用气压试验时，试验压力应为设计压力的（）。

A.1.5倍

B.0.5倍

C.2倍

D.1.15倍