皮皮学，免费搜题
登录
搜题
【单选题】
直流电机改善换向、 减小火花最好采用的是( )。A.
(A)选用合适电刷
B.
(B)适当移动电刷位置
C.
(C)增设换向极和补偿绕组
D.
(D)调整电刷的弹簧压力
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】给定赋权邻接矩阵w,matlab中创建图对象的命令不包括( )。
A.
graph(w)
B.
biograph(w)
C.
graph(sparse(w))
D.
plot(w)
【单选题】卖方在8月11日向国外某买方发盘,并称:限买方8月15日复到卖方有效,8月13日接到买方复电称:“你11日电接受,以获得进口许可证为准。”该接受( )。
A.
在卖方缄默的情况下，则视为有效接受
B.
相当于还盘
C.
属有效的接受
D.
属于一份非实质性改变发盘条件的接受
【单选题】Why does the author mention the Biograph Company?
A.
To identify the most successful company in the film industry at the time.
B.
To describe an exception to a trend in film exhibition in the early 1900s.
C.
To discuss the first addition of films to traditional entertainment programs.
D.
To illustrate the model on which most other small film companies were based.
【单选题】This biograph gave a ________ discription of her childhood.
A.
distorting
B.
distort
C.
distorted
D.
distorts
【单选题】Past heroes and heroines seem to be nobler than those of today according to their biographies.
A.
Y
B.
N
C.
NG
相关题目：