大气环境监测制度主要体现在（)。A．一级评价项目不得少于二期（冬季、夏季)；二级可取一期不利季节大气环境监测制度主要体现在()。
A. 一级评价项目不得少于二期(冬季、夏季)；二级可取一期不利季节，必要时取二期；三级评价必要时做一期监测
B. 监测频率的选取主要依据当地的气象条件和人们的生活规律
C. 由于气候存在周期性的变化，所以一级评价项目至少应取得有季节代表性的7天有效数据；对二级项目全期至少监测5天；三级项目全期至少监测3天
D. 现状监测应进行同步的气象观测
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The Global Method takes ______ as its theoretical basis.
A. behaviorist psychology
B. cognitive psychology
C. Gestalt psychology
D. psychoanalysis
Which of the following affective variables were not mentioned in Krashen' s affective filter hypothesis？
A. Motivation.
B. Self-confidence.
C. Anxiety.
D. Interest.
Chomsky holds the position that linguists should study the ______ of the native speaker.
A. linguistic performance
B. linguistic competence
C. communicative performance
D. communicative competence
In a Natural Approach classroom, most of the classroom time is spent on activities which foster______.
A. language acquisition
B. speaking ability
C. reading ability
D. writing ability
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