题目内容

[音频]

A. Sign up for free tutoring in writing.
B. Work with Dr. Pearl at his office every day.
C. Work with Dr. Pearl at The Found Librarian every day.
D. Go to the University Writing Center at 11 a.m. each Friday

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A. Disappointed.
B. Indifferent.
C. Patient.
D. Satisfied.

执行力的主要执行技巧不包括（）

A. 联线
B. 杠杆
C. 桥梁
D. 态度

把时间按其紧迫性和重要性分成四类。称为( )

A. 时间甘地图
B. 时间管理法
C. 时间管理矩阵
D. 时间四分法

已知对称三相电源的相电压uA=10sin(ωt+60°)V，相序为A─B─C，则当电源星形联接时线电压uAB为_____。

A. 10sin(ωt+90°)
B. 17.3sin(ωt+90°)
C. 17.3sin(ωt-30°)
D. 17.3sin(ωt+150°)