A:V(酸)=10V(碱)
B:V(碱)=10V(酸)
C:V(酸)=9V(碱)
D:V(碱)=9V(酸)
There're so many kinds of tape-recorders on sale that I can't make up my mind _______ to buy.
看拼音,写词语
róng máo
diào yú
yǒu qù
hé lǒng
zhè xiē
shǒu zhǎng
____