单选题
According to the second rule, too much liquid in the cooker may result in ________.
A、
a ruined meal
B、
undercooked food
C、
too little pressure
D、
a blocked vent pipe
【正确答案】
D
【答案解析】
[分析] 根据第二条原则“Overfilling the cooker may block the vent pipe and cause the cooker to explode．”可知答案为A。
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