国开在线答案
- 2022-09-12 [单选] 只要两物体接触面之间不光滑，并有正压力作用，则接触面处摩擦力一定不为零。
- 2022-09-12 [单选] 在求解有摩擦的平衡问题（非临界平衡情况）时，静摩擦力的方向可以任意假定，而其大小一般是未知的。
- 2022-09-12 [单选] — Would you please let me know something more about the project? —
- 2022-09-12 [单选] — Mr. Taylor, this is the project plan you asked me to make last week. —
- 2022-09-12 [单选] I’m sure you can things out.
- 2022-09-12 [单选] — When can you effect shipment? I’m worried about late shipment. —
- 2022-09-12 [单选] Goods are carried by several of transport--on road or rail, by sea or air.
- 2022-09-12 [单选] — Mr. Taylor, nice to see you again. Welcome to our company. —
- 2022-09-12 [单选] — May I know the cost for a 20 feet container from Guangzhou to LA? —
- 2022-09-12 [单选] Small holes should be made in the cloth to let the moisture out.