【单选题】Which of the following is not what Americans do on New Year’s Day?
C.
making New Year resolutions
【简答题】What is new about this year's meeting? [A] The cost for registration is low. [B] It offers money to some groups. [C] Individual students are welcome. [D] There is wireless Intemet service.
【判断题】某种抗生素使用一段时间后,会引起大量抗药性菌株,这是因为该抗生素对周围的敏感菌发挥了诱变剂的作用。
【判断题】某种抗生素使用一段时间后,会引起大量抗药性菌株,这是因为该抗生素对周围的敏感菌发挥了诱变剂的作用。
【判断题】分离角代表的是根轨迹趋向分离点或者离开分离点的方向。
【判断题】某种抗生素使用一段时间后,会引起大量抗药性菌株,这是因为该抗生素对周围敏感菌发生了诱变剂的作用。
【多选题】What do you often do on the New Year’s Eve?
A.
Watch CCTV New Year’s Gala.
C.
Have a family reunion dinner.