题目

如图所示，轻质不可伸长的晾衣绳两端分别固定在竖直杆、上的、两点，悬挂衣服的衣架挂钩是光滑的，挂于绳上处于静止状态，如果只人为改变一个条件，当衣架静止时，下列说法正确的是（ ）A.绳的右端上移到，绳子拉力不变B.将杆向右移一些，绳子拉力变大C.绳的两端高度差越小，绳子拉力越小D.若换挂质量更大的衣服则衣架悬挂点右移 The Smiths don’t usually stay at         hotels, but last summer they spent a few days at a very nice hotel by ________ sea. A．/; a                                B．the; the                   C．/; the                      D．the; a