读经纬网图，回答问题。 （1）A点的经度是 。 （2）从纬度看，A点属于 （北半球、南半球）。 （3）从经度看，B点属于 （东半球、西半球）。
At present there are many online courses and we can choose some to study by （we）．
Deep in his heart， Nelson Mandela wanted to help the black people to live （free）．
Miss White often has us （tell） interesting stories in her English class．
根据句意用所给单词的适当形式填空．
Look! Your room is really （tidy）． You should learn to be organized．
Qian Xuesen （consider） as "Father of Missile（导弹）in China"．
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