电子计算机的发展过程经历了四代，其划分依据是()。A．计算机体积 B．计算机速度 C

King's College Summer School is an annual(年度的) training program for high school students at all levels who want to improve their English. Courses are given by the teachers of King's College and other colleges in New York. Trips to museums and culture centers are also organized. This year's summer school will be from July 25 to August 15. More information is as follows:

小题1:The summer training program includes all of the following except_______.

A．doing a part-time job.

B．taking courses.

C．having sports.

D．travelling.小题2: If you want to live at a relative's home in New York, you will have to pay the school______.

A．$200.

B．$400.

C．$500.

D．$900.小题3:What correct information can you get from the passage?

A．The program will last two months.

B．You can e-mail or ring up the school.

C．You should write to Thompson only in English.

D．Students in China can send applications only on July 14.

晶体管非门电路如图所示，已知U_cc=15V，U_b=-9V，R_c=3kΩ，R_b=20kΩ，β=40。当输入电压U₁=5V时，要使晶体管饱和导通，R_x值不得大于：（设U_bc=0．7V，集电极和发射极之间的饱和电压U_ces=0．3V）（）

A.7.1kΩ

B.35kΩ

C.3.55kΩ

D.17.5kΩ

根据证券法律制度的规定，上市公司发行的公司债券上市交易后，下列情形中，证券交易所可以决定暂停公司债券上市交易的有()。

A．公司有重大违法行为

B．公司最近2年连续亏损

C．公司债券所募集资金不按照审批机关批准的用途使用

D．上市公司当年亏损导致净资产降至人民币4000万元

支气管扩张可在病变部位听到（）

A、痰鸣音

B、哮鸣音

C、捻发音

D、局限性间断湿啰音

E、局限性持久存在的湿啰音

以资产评估时所依据的市场条件、被评估资产的使用状态，以及评估结论的适用范围来划分资产评估结果的价值类型，具体包括( )。

A．继续使用价值

B．市场变现价值

C．市场价值

D．市场价值以外的价值

E．清算价值