Both his parents look sad.Maybe they _ w

读短文，判断正(T)误(F)。

      This is my mother. She is a nurse. She is short. But she is beautiful. This is my father. He is a teacher.

He is tall. He is handsome. I love them and they love me. We are a happy family.

( ) 1. My mother is a doctor.

( ) 2. She is tall.

( ) 3. My father is a businessman.

( ) 4. He is tall and handsome.

( ) 5. We are a happy family.

可承担单跨100m及以下桥梁工程的施工企业包括（）。

A.公路工程施工总承包特级企业

B.桥梁工程专业承包一级企业

C.桥梁工程专业承包二级企业

D.桥梁工程专业承包三级企业

E.公路工程施工总承包一级企业

如加压塔淹塔，是因为（）。

A、入料量大，采出少，蒸汽量小

B、入料量大，采出多，蒸汽量多

C、入量量小，采出少，蒸汽量小

D、入料量多，采出少，蒸汽量多

变压器安装在离地面高度为( )以上的变压器台上。

A．2m

B．2.5m

C．3m

D．3.5m

下列属于湿啰音的听诊特点的是（）

A.性质多变

B.部位较恒定

C.呼气时更加清楚

D.可由气流冲击管腔内黏稠分泌物引起震动所致

E.可由气流通过狭窄的支气管时发生旋涡所致