人们以______(符号是______)为单位来表示声音强弱的等级.
用分贝作为声音强弱等级的单位.符号用dB表示.
故答案为:分贝;dB.
. Barry hid himself behind the door, from __________ he could hear the steps of his father clearly.
A.which
B.that
C.when
D.where
根据括号中所给的汉语写出单词,使句子意思完整正确,并将答案填写在答题卡相应位置上。
The school library is 小题1: (开放的) Monday through Friday, 9a.m to 6 p.m.
I often 小题2: (买)gifts for my parents on their birthdays.
The children all 小题3: (跳)with joy when they heard the good news.
Where are you going to put your 小题4: (自行车)? It’s so crowded here.
Some teenagers don’t know how to 小题5: (处理)with their personal problems and they often go to therapy.