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【单选题】

Unlike the globe valve, gate valves give full bore flow without change of direction, such a valve is not suitable to partially open operationAccording to the above sentence, which of the following statements is not true?（）

A、The globe valve may be suitable for partially open operation

B、The globe valve will give full bore flow with change of direction

C、The gate valve gives full bore flow with change of direction

D、The gate valve is suitable for full bore operation only

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更多“Unlike the globe valve, gate valves give full bore flow without change of direction, such a valve is not suitable to partially open operationAccording to the above sentence, which of the following statements is not true?（）”相关的问题
第1题
[] The magnetic compass operates on the principle that（）.

A、A.like magnetic poles attract  B、B.unlike magnetic poles repel  C、C.unlike poles attract  D、D.the poles of the compass line up with the geographic poles of the earth  

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第2题
[多选题] Which the three EL expressions， inserted at line 15， are valid and evaluate to "3"？ （）

A、 ${vals.2 }  B、 ${vals ["2"]}  C、 ${vals.index }  D、 ${vals[index]}  E、 ${vals} [index]  F、 ${vals.（vals.index）}  H、 ${vals[vals[index-1]]}  

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第3题
[单选题] The globe valve has a bulbous body, housing a valve seat and screw down plug or disc arranged at right angles to the axis of the pipeAccording to the above sentence, which of the following statements is not true?（）

A、The profile of the valve is like a globe  B、The valve seat is set into the bulbous body  C、The plug or disc of the valve is made vertical to the axis of the pipe  D、The valve seat is located at right side of the plug or disc  

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第4题
[单选题] There are（）operational satellites in the INMARSAT system covering the whole globe except the polar regions.

A、3  B、4  C、8  D、12  

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第5题
[多选题] Given： 11. 15. Which three EL expressions， inserted at line 15，are valid and evaluate to "3"？（）

A、${vals.2}  B、${vals["2"]}  C、${vals.index}  D、${vals[index]}  E、${vals}[index]  F、${vals[vals[index-1]]}  

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第6题
[单选题] The steady current circling the globe at about 60°S is the（）.

A、Prevailing Westerly  B、Sub-Polar Flow  C、West Wind Drift  D、Humboldt Current  

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第7题
[单选题] The satellites over the major ocean regions cover the globe（）.

A、besides the polar regions  B、including the North Pole and the South Pole  C、above 70N and below 70S  D、as far north and south 70  

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第8题
[] 函数DIFF（‘A’）代表（）。

A、A.等价于VAL（‘A’，END）＋A的回零后值-A的回零前值-VAL（‘A’，BEG）  B、B.等价于VAL（‘A’，END）＋A的回零后值＋A的回零前值＋VAL（‘A’，BEG）  C、C.等价于VAL（‘A’，END）－A的回零后值-A的回零前值＋VAL（‘A’，BEG）  D、D.等价于VAL（‘A’，END）－A的回零后值＋A的回零前值-VAL（‘A’，BEG）  

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第9题
[] The satellites over the major ocean regions cover the globe（）.

A、A.besides the polar regions  B、B.including the North Pole and the South Pole  C、C.above 70N and below 70S  D、D.as far north and south 70  

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