用来测定发动机输出功率的仪器叫做（）。
参考答案：测功仪
Questions 19-22
A．Because it is properly cooked at home.
B．Because it is a kind of Yorkshire pudding.
C．Because he has never tasted it before.
D．Because he has made it all by himself.
柑桔春季的主要虫害有哪些？
