The four standard light colors used for lighted aids to navigation are red，green，white，and （）.

A、purple

B、orange

C、blue

D、yellow

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更多“The four standard light colors used for lighted aids to navigation are red，green，white，and （）.”相关的问题

第1题

[多选题] Which two statements about the implementation of WLAN QoS are true？（）

A、The 802.11e standard is the IEEE 802.11 OoS WLAN standard. B、The Wi-Fi Multimedia （WMM） standard decreases the eight priority levels to four access categories. C、The Wi-Fi Multimedia （WMM） standard is a Wi-Fi Alliance standard that increases the four priority levels to eight access categories. D、The Wi-Fi Multimedia （WMM） standard is an IEEE standard that increases the four priority levels to eight access categories. E、Wireless 802.11 deploys Distributed Coordination Function （DCF）， carrier sense multiple access with collision detection （CSMA/CD）， interframe spacing， and random wait timers to avoid collisions. F、Wireless OoS designs and implementations commonly use Layer 3 differentiated services code point （DSCP） or Layer 2 802.1 p to ensure priority

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第2题

[多选题] The two focuses of the education reforms in the mid-1980s were（）

A、the raising of the standards of teaching and the reform in curriculum B、the raising of the standards of teaching and learning and the restructuring of the schools C、the raising of the standards of teaching and the improvement of the standards of learning D、None of the above

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第3题

[单选题] 螺旋桨有四个桨叶。（）

A、The helm has four blades. B、The propeller has forty blades. C、The windlass has four blades. D、The propeller has four blades.

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第4题

[单选题] You create a Web page that contains the following code. You need to ensure that when the user clicks an item in the list， the text color of the "Welcome!" message will change. Which declaration should you use？（）

A、<ul id="color"> <li onclick="changeColor(this.innerText);">Black</li> <li onclick="changeColor(this.innerText);">Red</li> </ul> B、<ul id="color"> <li onclick="changeColor(this.style.color);">Black</li> <li onclick="changeColor(this.style.color);">Red</li> </ul> C、<ul id="color"> <li><a onfocus="changeColor(this.innerText);">Red</a></li> <li><a onfocus="changeColor(this.innerText);">Black</a></li> </ul> D、<ul id="color"> <li><a onfocus="changeColor(this.innerText);">Red</a></li> <li><a onfocus="changeColor(this.innerText);">Black</a></li> </ul>

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第5题

[单选题] The four-stroke cycle is so called because it takes （） to complete the processes needed to convert the energy in the fuel into work.

A、two strokes of the piston B、four strokes of the piston C、one revolution of the crankshaft D、four revolutions of the crankshaft

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第6题

[单选题] In four strokes engine, the cycle of events is completed in four strokes of （）.

A、the cylinder B、the crankshaft C、the piston D、the cross-head

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第7题

[单选题] The ONS 15216 is a 32-channel system. The ONS 15216 OADMs are capable of adding and dropping one, two, or four channels. How are the OADMs provisioned to add and drop specific channels?（）

A、The ONS 15216 OADM can be provisioned to add/drop one, two, or four channels via Cisco Transport Manager (CTM). B、The ONS 15216 OADM consists only of a four-channel module, and the number of ports utilized determines whether it is a one, two, or four channel OADM. C、Three separate OADM modules are available for one, two, and four channels. The wavelengths to be dropped and added are programmable via Cisco Transport Manager (CTM). D、The ONS 15216 OADM consists only of a single-channel module. Two-channel and four-channel support is available by stacking the single-channel module. E、The ONS 15216 OADM is available in one, two, four channels. There are 32 single-channel OADM modules, 16 two-channel OADM modules, and 8 four-channel OADM modules.