飞机左或右油箱油量低于（）时，燃油量表会指示低油量信息。
A.1675磅
B.2000磅
C.2500磅
D.2800磅
参考答案：B
Generally speaking, a computer works _______________ a human brain.
A．more accurately than
B．more accurate than
C．as accurate as
D．so accurately as
矿井安全监控信号，频率模拟量优先选用的是（）。
A．5～15Hz
B．200～1000Hz
C．2000～3000Hz
D．3000～4000Hz
