喷泉广场上组合喷泉的喷嘴竖直向上。喷嘴每秒钟喷出水的体积为5L

喷泉广场上组合喷泉的喷嘴竖直向上。喷嘴每秒钟喷出水的体积为5L，喷嘴处水流速度为20m/s。不计空气阻力，则处于空中的水的体积是（）

A．5L B．10L C．20L D．40L

答案

相关题目

忽然教堂的钟声敲了12下。祈祷的钟声也响了。窗外又传

忽然教堂的钟声敲了12下。祈祷的钟声也响了。窗外又传来普鲁士兵的号声——⑴他们已经收操了。韩麦尔先生站起来，脸色惨白，我觉得他从来没

In Canada, cross country skiing is a popular sport among people ______ they c

In Canada, cross country skiing is a popular sport among people ______ they can enjoy excitement and adventure. A. that B. where C. whom

下列做法不利于避免或减轻洪水造成损失的是（） A．

下列做法不利于避免或减轻洪水造成损失的是（） A．长江中上游地区植树造林 B．长江中下游地区围湖造田 C．黄河下游加固江防大堤 D．三江

质量为M的物块以速度v运动，与质量为m的静止物块发生正碰

质量为M的物块以速度v运动，与质量为m的静止物块发生正碰，碰撞后两者的动量正好相等，则两者质量之比为M/m可能为

If you can look through the text before class，you will find it easy to _____

If you can look through the text before class，you will find it easy to __________ what the teacher teaches. A．take up B．take on C．take in �

Each of the students, working hard at his or her lessons,___to go to university.

Each of the students, working hard at his or her lessons,___to go to university.” “So do I.”A. hope B. hopes C. hoping D. hoped

空气中含量较多且化学性质不活泼的气体是 �

空气中含量较多且化学性质不活泼的气体是（） A. 氧气 B. 二氧化碳 C. 氮气

I remember my first day here very clearly. My friend was waiting for me when my

I remember my first day here very clearly. My friend was waiting for me when my plane 21 at Kennedy Airport at 3 o’clock in the afternoon. The weather was very 22 and it was s

喷泉广场上组合喷泉的喷嘴竖直向上。喷嘴每秒钟喷出水的体积为5L

答案

相关题目

最新题目