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问题 单项选择题

诊断用X线机房的主防护铅当量厚度应是

A．0.5mm

B．1.0mm

C．1.5mm

D．2.0mm

E．2.5mm

答案

参考答案：D

解析：X线诊断机房的主防护应有 2mm铅当量的厚度。

阅读理解

阅读理解。

     Come and look at the photo. It's an American family. The woman in the middle is Beth White. She is our

teacher. The old woman on her right is her mother. She is Mrs. White. The man on her left is her father, Mr

White. He is an artist. The other young woman is Doris White. She is her sister. Doris White has two children.

They are students. Leo Bush is her son and May Bush is her daughter. May sits between her grandfather and

her father.  

     "What are they doing?"

     "The family are having a big dinner on Thanksgiving Day (感恩节)."

1. This is _______ family photo.

A. an American

B. an English

C. a Chinese

2. There are _______ in Beth White's family.

A. six people

B. seven people

C. five people

3. They are having _______.

A. sports

B. a family meeting

C. a big dinner on Thanksgiving Day

4. Beth's family name is _______.

A. Smith

B. White

C. Bush

5. Leo and May's father is _______.

A. Mr White

B. Mr Smith

C. Mr Bush

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单项选择题

施工总承包管理模式在费用控制方面的一个特点是（）。

A．多数情况下，由业主方与分包人直接签约，业主方风险较小

B．某部分施工图完成后，由业主单独或与施工总承包管理单位共同进行该部分工程的招标，分包合同的投标报价较有依据

C．在开工前就有较明确的合同价，有利于业主对总造价的早期控制

D．在进行施工总承包管理单位的招标时，已确定合同总造价，对业主风险较小
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