用汽车万用表测量空调出风口温度时，温度传感器应放在（）。
A.驾驶室内
B.驾驶室内外
C.高压管路内
D.风道内
参考答案：D
可听声的频率范围是______，频率高于______的声波叫做超声波，频率低于______的叫做次声波．
根据句意及汉语意思填写单词。
1. Betty looks like her father with a _____ (方形的) face.
2. We often borrow books and _____ (杂志) from our school library.
3. The man is kind enough to help people _____ (解决) problems.
4. Can you give some _____ (建议)on learning English?
5. When the teacher asks them questions, Cindy is very _____ (紧张的)
6. We cannot tell a person from his or her _____ (大体的) appearance.
7. Liu Xiang and Yao Ming are both my _____ (崇拜的人)
8. John is very interested in _____ (科学)
9. English is one of the most important _____ (语言) in the world.
10. The teacher praised him for his good _____ (文章)
