胶轮车空气过滤器有声响是什么原因（）。
A、吸气门关闭不严，气泵有反气现象
B、消音器大排黑烟
C、不受影响
D、柴油不纯
参考答案：A
根据句意或首字母填入所缺单词。
1. Don't worry! They arc living in s______.
2. A _______ some students, buses are not popular.
3. This teacher is very popular a _______ the students.
4. What's y _______ favorite transportation?
5. Not many people can a _______ to buy a car.
传感器是一种（），它直接接受被测参数的有关数据（信息），并能将所接受的物理量信息按（）转变成同种或别种物理量信息。
