气动仪表所用的能源是(),标准信号是()。
参考答案:压缩空气,20-100KPa
The hero's story _____ differently in the newspapers. [ ]
A. was reported
B. was reporting
C. reports
D. reported
下列有关人体消化过程的叙述,正确的是( )
A.食物中的脂肪在肝脏中被消化
B.牙齿的咀嚼和舌的搅拌也可以促进消化
C.胆汁内含有消化脂肪的消化酶
D.唾液淀粉酶能将淀粉分解成被小肠吸收的物质