安装工程一切险属于( )，目的在于为各种机器的安装及钢结构工程的实施提供尽可能全面

情景交际。补全对话，每空一词。

A: May I speak to Mary?

B: This is Mary 1______.

A: Hi, Mary. I haven't seen you for a long time. What has 2______ to you?

B: I have been in 3______.

A: Oh, sorry to hear that. But for 4______?

B: I had a car 5______ three weeks ago.

A: Really? So you were 6______.

B: Yes. But 7______, only my left arm was broken. And I can move it now.

A: Good. How did it 8______?

B: I was driving fast to work on that rainy morning. I can't stop my car and it 9______ another car.

A: You were driving too fast.

B: Yes. 10______ of the accident, I have to stay in hospital.

防水密封接缝材料均应进行复试。( )

TCP是互联网中的哪一层的协议，它使用3次握手协议建立连接( )。

A．应用层
B．会话层
C．传输层
D．网络层

在前台采集录入时，英文姓名最长录入25个字节，每组姓名之间以一个空格为间隔。

在Excel中，用"＆"运算符进行运算时，其运算对象的类型应为（）。

A.公式型

B.数值型

C.逻辑型

D.文本型