2. Which of the following is NOT true about this year’s Valentine’s Day?
A. In Britain’s biggest flower market, the trade doubles an average day.
B. The number of text message sent doubles the daily average.
C. The flower prices triple through Valentine’s Day.
D. The number of Valentine cards is 20% up on last year.
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3. What can we infer from the clip?
A. Many people choose not to celebrate Valentine’s Day because it’s quite commercialized.
B. The electronic ways become more popular than those traditional ways of celebration.
C. Many people still think it’s always good to give each other presents on Valentine’s Day.
D. Many people think that Valentine’s Day has lost its original significance.
Watch the clip again, and match the categories on the left with their corresponding numbers on the right.
以下关于“物理环境”说法正确的是():
A. 物理环境分为天然物理环境和人工物理环境
B. 物理环境是自然环境的一部分
C. 天然物理环境又叫原生物理环境,人工物理环境又叫次生物理环境
D. 以上说法都正确
物理因素的()超过人的耐受限度,称作物理性污染。
A. 数量
B. 范围
C. 多少
D. 强度