皮皮学，免费搜题
登录
搜题
【单选题】
关于声音的传播，下列说法中正确的是（ ）A.
只有气体和液体能传播声音，固体不能传播声音
B.
固、液、气体都能传播声音，且传播速度相同
C.
声音在气体中传播时受到阻碍较小，传播速度较大
D.
要想听到声音，必须有声源、传播声音的介质和良好的听觉器官
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】(2013·高考浙江卷)During the last three decades，the number of people participating in physical fitness programs ________ sharply.
A.
was increasing
B.
has increased
C.
had increased
D.
will be increasing
【单选题】During the 1980s, unemployment(失业人数)and underemployment(不充分就业)in some in some countries was so high as 90 per cent. Some countries did not【B1】enough food; basic needs in housing and clothing were not【...
A.
generate
B.
boost
C.
produce
D.
manufacture
【单选题】—How about getting a part-time job during the summer holidays? — , but I have promised to visit my cousin in Japan.
A.
No way
B.
Well done
C.
That sounds fine
D.
No, I’m terribly sorry
【简答题】测量时,记录员应对观测员读的数值,再复诵一遍,无异议时,才可记录在表中。记录有误,不能用橡皮擦拭,应_____________。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
