Which work appeared after Huangdi Neijing (Huangdi’s Canon of Medicine), not only was a summary of acupuncture and moxibustion, but also played a role of connecting the past and the future?
A. Nan Jing (Classic of Difficulties)
B. Zhenjiu Jiayi Jing (A-B Classics of Acupuncture and Moxibustion)
C. Tongren Shuxue Zhenjiu Tujing (Figure of Acupuncture at Tongren Acupoints)
D. Zhenjiu Dacheng (Compendium of Acupuncture and Moxibustion)
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变速恒频风电机组采用()来调节机组的功率因数
A. 变流器
B. 电容
C. 发电机
D. 动态无功补偿装置
风电机组控制中为避免共振,要对测量到的转速信号进行()滤波
A. 低通
B. 高通
C. 带通
D. 陷波
减载荷控制中,独立变桨主要是为了减小由风剪切引起的()载荷
A. 风轮俯仰弯矩
B. 发电机转矩
C. 风轮推力
D. 塔架侧向弯矩
偏航阻尼有两种形式,为阻尼衬垫或者是液压夹钳,如采用液压夹钳可在偏航过程中动态调节阻尼的大小。( )