搜题请搜索小程序“爱下问搜题”
问题 单项选择题

施加180°脉冲后，关于质子宏观磁化矢量M描述，错误的是（）

A.M与B0平行

B.M与B0方向相反

C.M与B0垂直

D.Mxy为零

E.Mz达到反向最大值

答案

参考答案：C

听力题

单词拼写

小题1:O_____________, you would be in a difficult position there now .

小题2:C______________ work with pleasure , you will find you live a happy life.

小题3:Five m__________ （乘） by four is twenty.

小题4:Patience is one of her many s____________.

小题5:--I hear you are enjoying your new job.

---On the c____________, I find it rather dull.

小题6:It’s ______________(难以置信的) how many cats she has .

小题7:This one’s s_____________ (稍微) better than that, but not much.

小题8:Is this a _____________(真的) Ming vase ?

小题9:She was sitting on the floor s______________(围绕) by books.

小题10:You can’t work here without a work p___________.(许可证).
查看答案
单项选择题

具有形象、直观、一目了然等优点的施工成本偏差分析法是()，它能够准确表达出施工成本的绝对偏差。

A.排列图法

B.表格法

C.横道图法

D.曲线法
查看答案