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【单选题】
关于优势度正确的概念是A.
群落各成员中，建群种的优势度最大
B.
群落各层优势种优势度均大于建群种
C.
确定生物优势度主要依据其频度
D.
群落各成员对群落的作用大小与其优势度
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反馈参考答案：
举一反三
【单选题】某城市最高时用水量为300L/s，其中集中供应的工业用水量为190L/s。干管各管段名称及长度(m)见下图。管段1-2，2-3，4-5为单向配水，其余为双向配水，则比流量qs为( )。
A.
0.0312
B.
0.0472
C.
0.0528
D.
0.0362
【简答题】用所给单词的适当形式填空。 1. This is an interesting book _____ (write) by Shakespeare. 2. Gina was my best friend when l was a kid, but _____(not see)her since 2002. 3. －How long have you been _____ (study) Engli...
【多选题】编制施工图预算时,实物法与单价法比较,其不同点包括( )。
A.
前者可以使用概算定额，后者不可
B.
前者工作量较小
C.
前者更符合实际
D.
前者采用当地的人、料、机单价
E.
前者便于工程造价管理部门集中统一管理
【简答题】This wonderful book______(write)by a young writer in Germany last year．
【简答题】In this semester, you are expected to read an English book written by a British author, and then write a book report in about 500 English words. You should submit your book report before the end of th...
【简答题】this book, write, by a famous woman writer, in 1995
【单选题】This book is very interesting. It is _____ by Helen. [ ]
A.
is writen
B.
write
C.
written
D.
wrote
【简答题】This is a book ______ (write) by a famous Chinese writer.
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