Temperature of boiling water cannot be measured by a ____ thermometer.

Answer

To answer the question "Temperature of boiling water cannot be measured by a ____ thermometer," we need to analyze the types of thermometers and their temperature ranges.

### Step-by-Step Solution:

1. **Identify the Types of Thermometers**:
- There are two main types of thermometers mentioned: clinical thermometers and laboratory thermometers.

2. **Understand the Range of Clinical Thermometers**:
- A clinical thermometer typically has a range from 35°C to 42°C. This range is suitable for measuring human body temperature but is not sufficient for boiling water.

3. **Understand the Range of Laboratory Thermometers**:
- A laboratory thermometer has a wider range, usually from 10°C to 100°C. This range allows it to measure the temperature of boiling water, which is 100°C.

4. **Determine the Temperature of Boiling Water**:
- The boiling point of water is 100°C.

5. **Conclude Which Thermometer Cannot Measure Boiling Water**:
- Since the clinical thermometer only measures up to 42°C, it cannot measure the temperature of boiling water (100°C). Therefore, the answer is that the temperature of boiling water cannot be measured by a clinical thermometer.

### Final Answer:
The temperature of boiling water cannot be measured by a **clinical thermometer**.