【单选题】Task 1 Choose the best answer to each question according to the passage we have learned. 1. According to the sample invitation card, why are they going to hold an office party?
【简答题】“Heard melodies are sweet, but those unheard / Are sweeter; therefore, ye soft pipes, play on”. These two lines are the poet’s description and appreciation of a ____ ____.
【判断题】The start end and the end end of a center line and a phantom line should be long dashes. And when these two types of lines are very short, they could be replaced by thin solid lines.
【单选题】Two equal magnitude forces are in opposite directions and their lines of action are separated by distance d. These two forces are applied to a solid disk, which is mounted on a frictionless axle. If d...
A.
One force on a line touching the circumference of the disk, the other on a line halfway to the center.
B.
One force on a line at a distance d from the center and the other on a line through the center of the disk.
C.
One force on a line at a distance d/2 from the center of the disk, and the other on a line at a distance d/2 on the opposite side of the center of the disk.
D.
Since all the other orientations give the same torque, choose this answer.