以下类方法定义正确的是（） A: class Student: fav=("唱歌","跳舞","绘画") def showFav(cls): for item in cls.fav: print(item) B: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(cls): for item in fav: print(item) C: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(cls): for item in cls.fav: print(item) D: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(): for item in fav: print(item)

以下类方法定义正确的是（） A: class Student: fav=("唱歌","跳舞","绘画") def showFav(cls): for item in cls.fav: print(item) B: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(cls): for item in fav: print(item) C: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(cls): for item in cls.fav: print(item) D: class Student: fav=("唱歌","跳舞","绘画") @classmethod def showFav(): for item in fav: print(item)

磁场描绘实验仪由哪几部分组成?( ) A: 圆形电流线圈二个、实验平台、探测线圈和 FAV-1 数显频率电流信号源电压测量仪; B: 圆形电流线圈二个、实验平台、探测线圈; C: 实验平台、探测线圈和 FAV-1 数显频率电流信号源电压测量仪; D: 圆形电流线圈二个、探测线圈和 FAV-1 数显频率电流信号源电压测量仪。

当中压级供气时，压力调节是由哪个活门完成？ A: PRV B: FAV C: PT

当中压级供气时，压力调节是由哪个活门完成？（） A: PRV B: FAV C: PT D: HPV

恒温控制器TCT的作用是？（） A: 控制PRV下游压力 B: 控制PRV下游温度 C: 超控OPV D: 控制FAV开度

（）一种流媒体封装格式，由于它形成的文件极小、加载速度极快，使得网络观看视频文件成为可能，因此FLV格式成为了当今主流视频格式 A: FLV B: FAV C: FLY D: FALV

3-6-2 图中拱轴线的方程为y=4fx(l-x)/l2，l=16m，f=4m。竖向支座反力FAV=____（向上为正）<br><img src="http://sc0.ykt.io/ue_i/20191222/1208579781570990080.jpg" alt="3-6.jpg" class="loadingclass"/>

for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是：__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1