在每台发动机的风扇区域有()
A.一个探测器
B.二个探测器
C.三个探测器
D.四个探测器
参考答案:C
用所给词的正确形式填空。
1. The music teacher taught us _____ (sing) many beautiful songs.
2. I find these games very _____(interest).
3. Please draw some _____(type) of cars on the blackboard.
4. We don't know how _____(go) to the bookshop.
5. What _____ you _____(think) dinosaur food is like?
湿度的体积比是湿气中水蒸气分体积与湿气的体积之比的106倍。