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【多选题】
生物群落的演替,按照演替发生的时间,可分为( )几种类型A.
世纪演替
B.
原生演替
C.
长期演替
D.
快速演替
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】阅读理解。 Mr. Jackson is a farmer and he lives in a small village. It was the last day of June. He drove to the town to buy some new clothes for his wife and his children. He got there after twenty minute...
【单选题】．To his great excitement, the day he looked forward to _______ at last!
A.
had come
B.
coming
C.
came
D.
to come
【单选题】The day he had been looking forward to______________at last.
A.
come
B.
came
C.
coming
D.
comes
【单选题】On the last day he _____.
A.
decided a big decision
B.
decided greatly
C.
made a decision
D.
had made a decision
【多选题】有关设计概算的表述正确的是（）。
A.
初步设计阶段必须编制设计概算
B.
设计概算的内容是静态投资
C.
设计概算是设计文件的重要组成部分
D.
技术设计阶段必须编制设计概算
E.
技术设计阶段必须编制修正概算
相关题目：
【单选题】The day he had been looking forward to______________at last.
A.
come
B.
came
C.
coming
D.
comes