对于汛期潮汐作用不明显的河口港，设计高水位应采用多年的历时累计频率（）的潮位。 A. 1%B. 2%C

A．

B．

C．

D．

You have recently written the code shown below:Hashtable emailAddresses = new Hashtable ();emailAddresses.Add ("Mia", "mia@ Certkiller .com");emailAddresses.Add ("Andy", "andy@ Certkiller .com");emailAddresses.Add ("Kara", "kara@ Certkiller .com");FileStream stream = new FileStream ("Email.dat", FileMode.Create);BinaryFormatter formatter = new BinaryFormatter ();formatter.Serialize (stream, emailAddresses);You need to ensure that you are able to load the emailAddresses object from the Email.dat file into your application.What should you do？（）

A.

B.

C.

D.

you have recently written the code shown below:Hashtable emailAddresses = new Hashtable ();emailAddresses.Add ("Mia", "mia@ Certkiller .com");emailAddresses.Add ("Andy", "andy@ Certkiller .com");emailAddresses.Add ("Kara", "kara@ Certkiller .com");You need to ensure that these e-mail addresses are stored in the Email.dat file so that you can load them againwhen the user restarts the application.What should you do？（）

A.

B.

C.

D.

A．appeal

B．apply

C．thrust

D．adjust

Have you () your daughter recently？

A: heard from

B: learnt from

C: heard at

A．

B．

C．

D．

Have you met Tom recently？

A.shortly

B.currently

C.lately

D.probably

—Do you have trouble finding the house？ —______.

A．No, completely none

B．Yes, completely none

C．No, hardly one

D．Yes, I've got one