阴黄的色泽特点为()
A.黄色鲜明其色如金
B.面色黧黑
C.黄色鲜明
D.萎黄不泽,目睛及小便不黄
E.黄色晦暗或如烟熏
参考答案:E
While teaching students, teachers should take into consideration ______ students develop at different rates.
A.the fact that
B.because
C.as long as
D.in spite of
计算题:有一只微安表,最大量程为100μA,内阻为1kΩ,改装后最大量程为10mA,问需并联一个多大的分流电阻?
已知:I1=100μA=0.1mA,R1=1kΩ,I=10mA求:R2=?