有一个电流表G,内阻Rg=30Ω,满偏电流Ig=1mA.要把它改装为量程0~3V的电压表,要____一个____的电阻.
下列叙述正确的是( )
根据句子选择正确的图片
A. - When is the English test? -It's on Nov. 2nd.
B. Miss Chen's birthday is on Sept. 2nd.
C. Our singing contest is on Jul. 1st.
D. Is maths test on Dec. 4th?
E. - When is school trip? - It's on May 5th.
____
通过探究蚂蚁的通讯,我们发现蚂蚁的通讯是靠( )