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【单选题】
关于上述DTD定义的描述正确的是()。A.
Customer元素能包含子元素，并且能为空
B.
Customer元素能包含文本，并且能为空
C.
Customer元素不能包含文本，也不能包含子元素
D.
Customer元素的所有实例的“称呼”属性必须有值，不能为空
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【单选题】如船无风无流时船速为10节,现顺风顺流各2节,则电磁计程仪显示的航速应为 ;多普勒计程仪显示的对地航速应为 。
A.
10节；12节
B.
12节；14节
C.
14节；12节
D.
10节；14节
【简答题】The engine is equipped with a charge air cooler. The insert type charge air cooler is mounted in a welded casing (air trunk) . The trunk is bolted to the engine block. Standard is a two-stage cooler m...
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the _____.
A.
water jackets and passage
B.
top of the radiator
C.
cylinder head
D.
bottom of the radiator
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the__________.
A.
bottom of the radiator.
B.
water jackets and passages.
C.
cylinder head.
D.
top of the radiator.
【单选题】检索词的匹配操作练习,利用手机或电脑,打开中国知网(www.cnki.net),在主页上方的检索框中输入“中草药萃取”,点击 ,浏览检索结果,检索结果是字面匹配还是智能语义匹配?( )
A.
字面匹配
B.
智能语义匹配
【简答题】Fill in the blanks based on the attached video-clip about a brief introduction to boilers in thermal power plant. 1. Burners in the boiler convert the chemical energy in the ___________ into thermal e...
【单选题】Coolant in a liquid-cooled system flows directly from the water pump to the ______.
A.
bottom of the radiator
B.
water jackets and passage
C.
cylinder head
D.
top of the radiator
【简答题】In an automobile engine, heat flows or transfers from the iron or aluminum cylinder to the cooling water, and from the coolant to the copper or aluminum radiator.
【简答题】Fill in the blanks based on the attached video-clip about a brief introduction to boilers in thermal power plant. 爱剪辑-steam boiler2.mp4 1. Burners in the boiler convert the chemical energy in the ____...
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