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【单选题】
你学会“手掌手册”的折纸方法吗?A.
会
B.
不会
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举一反三
【单选题】已知系统开环传递函数为 ,绘制根轨迹,以下描述正确的是( )。
A.
系统有1支根轨迹，根轨迹的起点为-2，根轨迹的终点为0；
B.
系统有3支根轨迹，根轨迹的起点为-2，根轨迹的终点为0、-1和-4；
C.
系统有3支根轨迹，三支根轨迹的起点分别为0、-1和-4，一支根轨迹的终点为-2，另外2只根轨迹的终点为无穷远；
D.
系统有3支根轨迹，三支根轨迹的起点分别为0、-1和-4，三支根轨迹的终点为-2；
【简答题】按照光固化树脂参加光固化交联过程中的反应机理，可以把光固化树脂分为三类：分别是自由基型光固化树脂、阳离子型光固化树脂和 。
【多选题】A Chinese foreign trade expoter exported 30 000 boxes of goods, contracting to ship the goods in each lot during March to August,5 000 boxes each month, payment by confirmed irrevocable letter of cred...
A.
In order to get payment in due time ,we were supposed to do so.As credit is independent of the contract and once the credit and the relating documents are in conformity ,the exporter can get payment
B.
The letter of credit generally indicate that "the latest date of shipment is 31st,August, by partial shipment",According to UCP 600 section 31A"Unless there are other stipulations, transshipment and partial shipment is allowed".So our exporter was right
C.
in case of trouble in the following days,we shall adopt partial shipment in equal lots,which is corresponding to the contract and letter of credit
D.
Our exporter was wrong. because it is inconsistent with contract
【简答题】能量信号的平均功率为（）
【简答题】设系统的开环传递函数为 。 (1)试绘制开环频率特性的幅相特性图； (2)试用奈奎斯特(Nyquist)判据判断系统的稳定性； (3)试确定相角裕度γ的正负。
【简答题】请给出紫外线光固化胶的组成及固化机理。
【单选题】What will the woman do at ten o'clock tomorrow?
A.
Meet with a supervisor
B.
Receive her deliver
C.
Meet with a client
D.
Contact the shipping manager
【单选题】党的十八大在建设社会主义核心价值体系的基础上，首次提出了三个“倡导”。在这三个“倡导”中，体现社会层面的价值目标是( )
A.
富强、民主、文明、和谐
B.
自由、平等、公正、法治
C.
爱国、敬业、诚信、友善
D.
自由、平等、公正、互助
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