Operate the dimmer switch and make sure that the intensity of the light changes.
答案解析
解析：
这句话的意思是：操作调光开关，并确保灯光的亮度发生变化。接下来，我们来逐一解析选项，以确定哪个最符合题意。
### 选项分析
**A. Utilize the dimmer switch and ensure that the light's luminosity varies vigorously.**
- **解析**：这个选项建议“确保光的亮度剧烈变化”。“Vigorously”意味着非常强烈或剧烈。虽然这个选项传达了光的亮度应该发生变化，但用词过于夸张，不符合实际使用调光开关的情况。调光开关的目的是让光线在一个范围内逐渐变化，而不是剧烈变化。
**B. Manipulate the dimmer switch to confirm the alteration of the light's intensity.**
- **解析**：这个选项建议“操作调光开关以确认光的强度发生变化”。“Alteration”表示变化，而“manipulate”意味着操作，这与题干的要求完全一致。这个选项明确且准确地表达了需要操作调光开关以确保光的亮度有变化，而不强调变化的幅度。
**C. Activate the dimmer switch and ascertain that the light's intensity undergoes little changes.**
- **解析**：这个选项建议“确认光的强度变化很小”。这与题干的要求相反，因为题干要求光的强度应该发生变化，而不是变化很小。这与题意不符。
### 结论
根据以上分析，最符合题意的选项是 **B**。它正确地表达了需要操作调光开关并确认光的强度发生变化的要求。
### 深入理解
**调光开关的工作原理**：
调光开关可以调节灯光的亮度。你可以想象调光开关像是一个音量旋钮，它让你能够在最亮和最暗之间找到一个合适的亮度。调节这个开关，你会看到灯光逐渐变亮或变暗。这个过程不需要突然变化，而是平稳的过渡。
**类比例子**：
假设你在做一道菜，调味料的添加就像是操作调光开关。你可以慢慢添加盐，尝一尝味道的变化。目标是找到最合适的味道，而不是突然加入太多盐，导致菜肴过咸。调光开关也是如此，目的是通过逐步调节，找到适合的亮度。
相关知识点：
操作调光开关，确保光强变化
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