在通电流的长直导线周围会有磁场产生,其磁力线的形状为以导线为圆心的封闭的同心圆,且磁场的方向与电流的方向()。
A、相反
B、相同
C、平行
D、垂直
参考答案:D
单词拼写
1. This bank has formed three______(分支机构) in three different cities.
2. When you are abroad, you must find ways to______(使…适应) yourself to the culture and custom
there.
3. The man decided to buy some . (家具)
4. Children should be told not to follow (陌生人).
5. He is one of the winners of the game ____(属于)to our class.
6. As everyone knows, children are ______(好奇)about how things work.
7. It is _______(方便的)to live near stores and bus stations.
8. She's ______(很少)seen to read a newpaper in her spare time.
9. What's your_____(态度)to the plan that we'll spend a lot of money on this project?
10. Bill was doing a lot of exercise to build up his (力量).
什么是反射波的共炮点时距曲线方程?