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单选题
（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.
A
Stray current
B
Rated current
C
Starting current
D
Earth current
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单选题Convection spreads a fire by（）.A
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问答题Practice 1 You should spend about 20 minutes on this task. The graph below shows the demand for electricity in England during typical days in autumn and spring. The pie chart shows how electricity is used in an average English home. Summarize the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
考题
单选题（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.A
Stray currentB
Rated currentC
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Earth current
考题
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SELECT姓名FROM S WHERE学号=（SELECT学号FROM SC WHERE课程号=‘C2’)
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单选题查询出所有名字以’S’开始的员工（）A
select * from emp where ename in 'S%';B
select * from emp where ename='S%';C
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考题
单选题A stream of water immediately surrounding a moving vessel’s hull，flowing in the same direction as the vessel is known as（）.A
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考题
单选题Radiation can spread a fire by （）.A
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DELETE FROM S WHERE SN=’JULIE’B
DELETE*FROM S WHERE SN=’JULIE’C
DELETE FROM S WHERE SN=JULIED
DELETE*FROM S WHERE SN=JULIE
考题
单选题When referring to dry bulk cargoes，the term “flow state”（）.A
designates the state of a commodity when the ship is heeled past the angle of reposeB
relates to the suitability of loading a cargo by flowing down inclined chutesC
refers to the saturation of a dry bulk product with water to the point where it acts as a liquidD
relates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°
考题
单选题Radiation spreads a fire by（）.A
transferring heat across an unobstructed spaceB
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transmitting the heat of a fire through the ship's metal
考题
单选题可以删除学生表中学号为‘s2008005’的是（）。A
begin tran delete from学生表where学号=‘s2008005’ rollbackB
begin tran delete from学生表where学号=‘s2008005’ commitC
begin tran delete where学号=‘s2008005’ from 学生表 rollbackD
begin tran delete where学号=‘s2008005’ commit
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