在玉米生长期间,如果发生大面积的虫害,对玉米的产量会有什么影响?请说明理由。

题型:问答题

问题:

在玉米生长期间,如果发生大面积的虫害,对玉米的产量会有什么影响?请说明理由。

考点:光合作用
题型:问答题

抑制心肌细胞对腺苷的摄取,扩张冠状血管的抗心绞痛药是()。

A.硝酸甘油

B.硝苯地平

C.普萘洛尔

D.双嘧达莫

E.地尔硫

题型:问答题

读某类型森林海拔与地理位置分布相关示意图,回答1~2题。

1.该森林类型可能是[ ]

A.热带雨林

B.亚热带常绿硬叶林

C.温带落叶阔叶林

D.亚寒带针叶林

2.如图所示,该森林主要分布于[ ]

A.亚欧大陆和北美大陆

B.亚欧大陆和南美大陆

C.澳大利亚大陆和非洲大陆

D.澳大利亚大陆和南美大陆

题型:问答题

经济发展水平可以从( )方面进行分析。

A.国内生产总值及增长率

B.固定资产投资规模

C.劳动生产率

D.资金利润率

E.城市化水平

题型:问答题

The approach we propose is a system-oriented methodology for knowledge acquisition, this orientation emphasizes ongoing documentation throughout each cycle and technique applied. Program-wide documentation is suggested, both for the purpose of internal (91) and for later verification and (92) efforts. The documentation system we propose includes a central "knowledge acquisition (93) " which is (94) to reflect knowledge acquisition plans, session nodes, and domain expert participation. Specifically, (95) within the database system include knowledge acquisition forms, which document plans for, and notes from, knowledge acquisition session, domain expert file, and rule content forms.

A. edited B. updated
C. exchanged D. revised

题型:问答题

中修有何规定?

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