
致病性大肠埃希氏菌中毒的原因是由于食物没有经过低温冷藏或冷冻。
A . 正确
B . 错误


A . 正确
B . 错误
Task 1 Fill in the blanks with the words or phrases from Reading A and Reading B that match the meanings in the column on the right. The first letters are already given. (填写完整单词,包括首字母)
e _________ officially in effect or in force
c _________ official request for an amount of money
p _________ a clause in a law or contract stating that a condition must be met
m _________ the largest amount, number, extent, or degree possible or allowed
e __________ relating to, consisting of, or based on evidence
i __________ impossible to change or stop
s __________ to specify something such as a condition when making an agreement or an offer
v __________ having binding force in law
e __________ to prevent somebody or something from being considered or accepted
i impossible to overcome or deal with successfully