问题 单项选择题

在RL串联正弦交流电路中,总阻抗()。

A、Z=R+XL

B、Z2=R2+XL2

C、Z=R2+XL2

D、Z2=R+XL2

答案

参考答案:B

完形填空

第二卷

第四部分:写作(共35分)

第一节 短文填词(共10小题;每小题1分,满分10分)

阅读下面短文,根据汉语提示、首字母提示或语境提示,在每个空格内填入一个适当的英语单词使短文意思完整,并将该词完整地写在右边相对应的横线上。所填单词要求意义准确、拼写正确。

Organized by the Students’ Union, we watched the newly-released

sci-fiction movie — 2012 last ______ (星期六) evening. In the movie, the    76. __________

end of our world falls on Dec. 21, 2012. On the day,______(地震)          77. __________

occur and volcanoes erupt,c______ millions of deaths and leaving            78. __________

people desperate. Our planet is d______ in an instant. People across            79. __________

the world tried to s______ the catastrophe.                                80. __________

Having watched the movie, I was lost in thought. ______ is high time                81. __________

that human beings should protect the ______ (环境) better. If we continue              82. __________

to care s______ little about our earth, we human beings will be punished               83. __________

for______ we do today. I suggest everybody lead a more eco-friendly life.      84. __________

Do remember everybody can _______ a difference.                         85. __________

单项选择题 B1型题