开户单位在临时存款账户和专用存款账户提现时，提现金额当日单笔或累超过5万元（含5万元

把代数式a²-2ab+b²分解因式，下列结果中正确的是（　　）

A．（a-b）²

B．（a+b）²

C．（a+b）（a-b）

D．a²-b²

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
Spread spectrum simply means that data is sent in small pieces over a number of the (16) frequencies available for use at any time in the specified range. Devices using (17) spread spectrum(DSSS) communicate by (18) each byte of data into several parts and sending them concurrently on different (19) . DSSS uses a lot of the available (20) , about 22 megahertz(MHz).

A．direct-sequence

B．discrete-sequence

C．duplicate-sequence

D．dedicate-sequence

制度化逃避

PC可以看成是程序存储器的地址指针。（）

从焊接性能上来分，下列最容易焊接的钢材种类是（）

A、冷轧低碳钢板

B、加磷高强度冷轧钢板

C、烘烤硬化钢

D、热扎酸洗板