在单极性的SPWM调制方式中,参考信号为单极性信号而载波信号为双极性三角波
参考答案:错
Ⅳ.单词拼写(20分)
1.A stand-up comedian can tell different jokes in r________ to the reactions of an audience.
2.It is good behavior to q________ up to buy tickets.
3.Do you enjoy tragedy or c________?
4.Shakespeare compared life to s________.
5.Mr.Wang has a good sense of h________, so he is popular with the students.
6.He was a________ a prize for good conduct.
7.Billy Crystal has his o________ ability to improvise.
8.There are too many people in the street.It’s so c________.
9.She married a f________ from Canada.
10.The factory needs more s________ workers.
按照《小企业会计准则》的规定,下列不作为长期待摊费用的是()。
A、已提足折旧固定资产改建支出
B、经营租入固定资产的改建支出
C、固定资产的大修理支出
D、无形资产研发费用中不符合资本化的费用