You are Master of a towing vessel engaged in towing three barges astern.The middle barge of the tow would be required to sound which of the following during restricted visibility （）. No fog signal。 A prolonged blast at intervals never to exceed more than two minutes。 A prolonged blast followed by two short blasts at intervals never to exceed more than two minutes。 A prolonged blast followed by three short blasts at intervals never to exceed more than one minute。
企业与供应商之间的关系大致有以下类型（）。 短期目标型。 长期目标型。 渗透型。 联盟型。 纵向集成型。
下图为碎屑物粒度、侵蚀、搬运、沉积与流体速度之间的关系图。
据上图可知：（） 流体速度为20cm/S时未固结的粘土和粉砂，砾石都沉积下来。 粒度大于2mm的砾石在速度小于150cm/S时便沉积下来，大于1000cm/S时被侵蚀。 粒度小于0.5mm的碎屑物开始搬运的速度大，沉积速度很低。 流体对各级颗粒物的搬运能力与流体速度无关，只与颗粒物大小有关。
You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made.You should（）. hold course and sound a two blast whistle signal。 hold course and sound no whistle signal。 change course to the right and sound one blast。 hold course and sound two prolonged and two short blast。
One of the differences between a two-stroke engine and a four-stroke engine is,（） a two-stroke engine works without exhaust operation。 a two-stroke engine works without compression stroke。 a two-stroke engine works without expansion stroke。 a two-stroke engine works without suction operatio。
在用IE进行信息浏览时，下列操作正确的是（）。
