如果发现直流双臂电桥检流计灵敏度不够，应增加灵敏度，变化0.2%检流计偏离零位约（）格。
A.1
B.2
C.3
D.4
参考答案：A
They often do sports, ______ swimming, running and playing football.
A．as well as
B．as usual
C．as a result
D．such as
下列哪个大洲既位于北半球又位于西半球？[ ]
A、亚洲
B、非洲
C、北美洲
D、南美洲
