The Descendants of the Sun(太阳的后裔) that really ____ (earn) the praise(reputation)of K－drama fans. It made its debut(首映) on February 24, 2016 with an average of 13 percent in the Seoul National Capital Area. The next night, ratings ____ (go) up an average of two percent. ____ (apparent), those two episodes set up Descendants of the Sun as it dominated the competition with its third episode. ____ nationwide and Seoul National Capital Area for both TNmS Ratings and AGB Nielson, the K－drama earned over 20 percent viewership ratings(收视率).

    For those ____ do not know what Descendants of the Sun is about, it is a drama about the love of people who get ____ (close) as they learn to be considerate of each other in desperate times. It is also about the sacrifices made by people who throw themselves ____ natural disasters. Captain Yoo Shi Jin(柳大尉) (Song Joong Ki宋仲基) is the team leader of the Special Warfare Command of the United Nations Peacekeeping Troops. By request of the UN, he is ____ (station) in the war-torn country of Uruk(乌鲁克). ____he meets Kang Mo Yeon(姜暮烟) (Song Hye Kyo宋慧乔), a volunteer doctor with Doctors Without Borders.____they work alongside each other, they clash and fall in love.

把图中的凸透镜看作眼睛的晶状体，光屏看作是视网膜．给凸透镜“戴”上近视眼镜，使烛焰在“视网膜”上成一清晰的像．若“取下”近视眼镜，为使光屏上的像清晰，在保持烛焰和透镜位置不变的条件下，应将光屏（  ）

一个箱子重为100N，放在水平面上，受6N的水平推力，箱子未动，这时箱子受到的摩擦力____ 6N，（选填“大于”、“等于”或“小于”），当水平推力增大到10N时，箱子恰好做匀速运动，当水平推力增大到200N时，箱子受到的摩擦力为____ N．