下列各种类型的骨折中属于不稳定骨折的是（）。

A.斜形骨折

B.裂纹骨折

C.粉碎骨折

D.青枝骨折

E.螺旋形骨折

If you ever went to the United States to study in a college or a university, one of the first things you would have to do is to open a checking account. If you went to a bank to open an account, you would probably go through most of the following procedures. Not all banks have the same requirements for opening new accounts, of course, and the routine may vary somewhat.
First you would go to the New Accounts Department and fill out a signature card. In order to open an account, you would have to offer proof of your identity (身份). A passport is one of the best kinds of identification to have, but other kinds are accepted, one of the most common being a driver’s license.
You would need to have a permanent address in the city, and you would also be asked to supply the name of a permanent resident who is willing to recommend you. For this purpose you could use the name of your landlord or landlady, for example, or the name of the foreign student advisor at the university. And last but not least, you would need to bring some cash with you in order to open your account. Many banks require a minimum cash deposit of $ 50.

In order to open an account, you should ______.

A．have a permanent address

B．be a permanent resident

C．be able to drive

D．have a foreign student advisor