一RLC串联谐振电路，已知r=10Ω，L=64μH，C=100pF，外加电源电压u_s=1V。求电路谐振频率f₀、品质因数Q、带宽B、谐振时的回路电流I₀和电抗元件上的电压U_L和U_C。

A. She agrees with the man"s choice.
B. She doesn"t recommend the red tie.
C. She doesn"t think the man needs to wear a tie
D. She has no opinion about men"s clothing.

A. oil and coal both have complex molecular structures.
B. all fossil fuels produce carbon dioxide when burned.
C. natural gas releases substantially less carbon dioxide than other fuels.
D. natural gas emits far less nitrogen and sulfur.

A. She forgot to bring her skates.
B. She"s staying home from work today.
C. She made other plans.
D. She has to work late tonight.

A. Her hometown doctor works at thestudent health center.
B. She cannot help the man choose a doctor.
C. She didn"t know she needed a physical exam to play basketball.
D. The man should visit a doctor in his hometown.