How many superbugs were placed on the "urgent threat" list by CDC?A、3.B、2.C、5.

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问题 How many superbugs were placed on the "urgent threat" list by CDC?

选项 A、3.
B、2.
C、5.
D、4.

答案 C

解析 5种“超级细菌”上了美国疾病控制与预防中心(CDC)的“严重威胁名单”，比原来多了2种。因此，答案是C。注意，数字历来是考查的重点之一。

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