皮皮学，免费搜题
登录
搜题
【简答题】
有 5 件任务都需要两步操作 ( 先 1 后 2) 来完成,表 1 给出了相应的加工时间 : (1) 根据 Johnson 算法安排工作顺序 ; (2) 计算总流程时间和平均流程时间。 表1 任务 操作1所需时间(小时) 操作2所需时间(小时) A 3.0 1.2 B 2.0 2.5 C 1.0 1.6 D 3.0 3.0 E 3.5 1.5
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】通过透镜观察到一个放大的像，则物体应放在（　　）
A.
1倍焦距和2倍焦距之间
B.
1倍焦距之间
C.
2倍焦距之外
D.
2倍焦距处
查看完整题目与答案
【多选题】Why is full-duplex Ethernet superior to its single-duplex counterpart? (Select two answer choices.)
A.
It uses inexpensive hubs
B.
It operates without collisions
C.
It operates on switches
D.
It provides faster data transfer
E.
It utilizes fewer wiring pairs
查看完整题目与答案
【简答题】验电的步骤和要求是什么?
查看完整题目与答案
【简答题】对于有复验要求的元件还应该进行（ ）等复验。
查看完整题目与答案
【单选题】除氟可采用吸附过滤、混凝、电渗析、电解法等方法,我国应用最多的是( )。
A.
电解法
B.
混凝法
C.
电渗析
D.
吸附过滤
查看完整题目与答案
【多选题】交底的目的是（ ）。
A.
了解工作技术上的特点
B.
了解技术质量要求
C.
了解工程进展
D.
了解工作方法与措施
查看完整题目与答案
【单选题】The bank clerk listened carefully he could discover exactly what the client wanted.
A.
in case that
B.
now that
C.
so that
D.
provided that
查看完整题目与答案
【单选题】当大风停下了,孩子们又出来玩了。
A.
The winds  stopped, the children came out to play again.
B.
When the winds stopped, the children came out to play again.
C.
While the winds stopped, the children came out to play again.
查看完整题目与答案
【多选题】Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?（）
A.
Full-duplex Ethernet uses CSMA/CD to prevent collisions.
B.
Half-duplex Ethernet uses a loopback circuit to detect collisions.
C.
A full-duplex Ethernet card allows 20Mbps for data transmission.
D.
Full-duplex Ethernet makes use of two pairs of wires for data.
E.
An Ethernet hub can operate both half and full duplex simultaneously.
查看完整题目与答案
【多选题】When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)
A.
Half-duplex Ethernet operates in a shared collision domain.
B.
Half-duplex Ethernet operates in an exclusive broadcast domain.
C.
Half-duplex Ethernet has efficient throughput.
D.
Half-duplex Ethernet has lower effective throughput.
E.
Half-duplex Ethernet operates in an exclusive collision domain.
查看完整题目与答案
相关题目：
【单选题】通过透镜观察到一个放大的像，则物体应放在（　　）
A.
1倍焦距和2倍焦距之间
B.
1倍焦距之间
C.
2倍焦距之外
D.
2倍焦距处
查看完整题目与答案
【多选题】Why is full-duplex Ethernet superior to its single-duplex counterpart? (Select two answer choices.)
A.
It uses inexpensive hubs
B.
It operates without collisions
C.
It operates on switches
D.
It provides faster data transfer
E.
It utilizes fewer wiring pairs
查看完整题目与答案
【简答题】验电的步骤和要求是什么?
查看完整题目与答案
【简答题】对于有复验要求的元件还应该进行（ ）等复验。
查看完整题目与答案
【单选题】除氟可采用吸附过滤、混凝、电渗析、电解法等方法,我国应用最多的是( )。
A.
电解法
B.
混凝法
C.
电渗析
D.
吸附过滤
查看完整题目与答案
【多选题】交底的目的是（ ）。
A.
了解工作技术上的特点
B.
了解技术质量要求
C.
了解工程进展
D.
了解工作方法与措施
查看完整题目与答案
【单选题】The bank clerk listened carefully he could discover exactly what the client wanted.
A.
in case that
B.
now that
C.
so that
D.
provided that
查看完整题目与答案
【单选题】当大风停下了,孩子们又出来玩了。
A.
The winds  stopped, the children came out to play again.
B.
When the winds stopped, the children came out to play again.
C.
While the winds stopped, the children came out to play again.
查看完整题目与答案
【多选题】Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?（）
A.
Full-duplex Ethernet uses CSMA/CD to prevent collisions.
B.
Half-duplex Ethernet uses a loopback circuit to detect collisions.
C.
A full-duplex Ethernet card allows 20Mbps for data transmission.
D.
Full-duplex Ethernet makes use of two pairs of wires for data.
E.
An Ethernet hub can operate both half and full duplex simultaneously.
查看完整题目与答案
【多选题】When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)
A.
Half-duplex Ethernet operates in a shared collision domain.
B.
Half-duplex Ethernet operates in an exclusive broadcast domain.
C.
Half-duplex Ethernet has efficient throughput.
D.
Half-duplex Ethernet has lower effective throughput.
E.
Half-duplex Ethernet operates in an exclusive collision domain.
查看完整题目与答案