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【单选题】
某一种群的年龄锥体的形状为基本狭窄,顶部较宽,这样的种群属于:A.
增长型种群
B.
爆发型种群
C.
稳定型种群
D.
下降型种群
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】完形填空。 Jose had just seen his friend, Mike. Several hours ago his friend was 1 by a speeding truck and hurt badly. He wept (流泪) silently as he thought about his 2 friend. Nothing else seemed to 3 now. ...
【简答题】非特异性感染常见的致病菌有 、 、 和 。
【单选题】Task 1 Mike and his friend Judy are talking about his new job. Listen to the conversation and choose the best answer to each question you hear. Question 1
A.
Marketing Department.
B.
Personnel Department.
C.
Sales Department.
D.
After-sales Service Department.