皮皮学，免费搜题
登录
搜题
【单选题】
回声测深仪的原理是________。A.
利用电磁波在水中等速直线传播和具有反射特性的原理来测定水深的
B.
利用超声波在水中等速直线传播和具有反射特性的原理来测定水深的
C.
利用超声波在不同水深的传播速度不同的特点，测量发射与接收频率的原理来
D.
A、B、C均不对
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】阅读下列代码 public class { public static void main(String args[]){ double d=12.3 Decrementer dec=new Decrementer() dec. decrement(D) System. out. println(D) } } class Decrementer{ public void decrement(d...
A.
12.3
B.
11.3
C.
13.3
D.
-1.0
【单选题】According to Paragraph 3, what was partially responsible for the algae's rapid expansion in the 1990s?
A.
The species' ability to reproduce rapidly in warm tropical waters.
B.
The transportation of cargo between Monaco and other Mediterranean countries.
C.
The development of new strains of the algae in California and Australia.
D.
The failure of Mediterranean authorities to act decisively.
【单选题】What is the writers attitude towards Mr. Woodheads opinion?
A.
Supportive.
B.
Partially approving.
C.
Doubtful.
D.
Opposite.
【简答题】What was partially responsible for Jordan’s retirement from basketball in 1993?
【简答题】Which gender is the most talkative? No matter what you answer, you are partially right. A recent Gallup Poll showed that both men and women believe that women possess the gift of talking and some even...
【简答题】滴定接近终点时,应控制半滴加入,请描述加入半滴溶液的方法____。
【单选题】What sublevel is being partially filled for transition elements?
A.
s sublevel
B.
p sublevel
C.
d sublevel
D.
f sublevel
相关题目：