【单选题】以下哪个选项的说法是错误的( )
B.
应该获得对软件所做修改的技术文档,即使多付一些费用,也是值得的
D.
如果用 VB 等工具对软件进行改进,大客户自己将拥有知识产权
【单选题】常见不同层数电路板说法不正确的是
A.
单面板是最基本的PCB,元件集中在其中的一面,走线集中在另一面上。
B.
多层电路板的各层中,只能有一个电源层,一个地线层。
C.
双面板两面都有布线,两个面都可以焊接元件,布线则必须要在两面之间有适当的电路连接,这种电路间的”桥梁“叫 过孔(via)
D.
多层板常见有4层,6层,10层等。简单的4层板是在 顶层和底层的基础上增加了电源层和地线层,这样做一方面极大程度上解新局面了电磁干扰,提高了系统 的可靠性,另一方面提高布通率,缩小PCB面积。
【单选题】Amy: This printer is messed up.
B.
That's not a big deal.
C.
The printer is working.
【简答题】Fill in each of the blanks with one word or phrase to complete the following sentences with the help of the initial letter. Change the forms where necessary. We e __________ a number of difficulties i...
【多选题】《廉政准则》中明确规定,禁止违反规定选拔任用干部。不准有下列行为:()
【简答题】按照《廉政准则》规定,禁止违反规定选拔任用干部。不准有( )行为。 A采取不正当手段为本人或者他人谋取职位 B不按照规定程序推荐、考察、酝酿、讨论决定任免干部 C私自泄露民主推荐、民主测评、考察、酝酿、讨论决定干部等有关情况 D在干部考察工作中隐瞒或者歪曲事实真相
【单选题】Complete the sentences with a word or phrase in the box. Each word can be used once. (choose the letter lable to fill in the blanks rather than the complete words)
J.
violentEngland __________ their main rivals in the first round of the competition.
【单选题】What do we learn about the untreated industrial chemical wastes from the passage?
A.
They can conserve the normal biological action of rivers.
B.
They all react with water to increase the acidity of rivers.
C.
They make the water corrosive enough to destroy living organisms.
D.
There are no rules for concentrations of unquestionably toxic chemicals of drinking water.
【单选题】Methanogens produce methane from decomposition of wastes under