调节电视的音量旋钮是在调节声音的 [ ]
A.音调
B.响度
C.音色
D.频率
答案:B
Maggie’s house is next to mine. We see each other _________.
A.a number of
B.a lot of.
C.a great deal
D.a great many
移液管也称吸管,用于准确转移一定体积的液体。