【单选题】
A <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>oil temperature must be<{br/}>
above the yellow line of the temperature scale.<{/td}>
<{/tr}><{/tbody}><{/table}>
B <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>40% N1
at least 3 minutes<{/td}>
<{/tr}><{/tbody}><{/table}>
C <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>use
minimum 40% N1 for at least 5s<{/td}>
<{/tr}><{/tbody}><{/table}>
D <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>All of
the above.<{/td}>
<{/tr}><{/tbody}><{/table}>
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