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单选题
According to the fifth rule, a pressure cooker cover should be opened _____.
A
as soon as the cooking is finished
B
while it is still on the stove
C
with force when it is hot
D
after it is cooled down
参考答案
参考解析
解析：
由文中第五条第二句话“Allow the cooker to cool or run it under cool water before…”可知，必须等到高压锅冷却后才能打开锅盖。所以正确的答案为D。
由文中第五条第二句话“Allow the cooker to cool or run it under cool water before…”可知，必须等到高压锅冷却后才能打开锅盖。所以正确的答案为D。
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