默写。
①晓战随金鼓,____。(李白《塞下曲六首》)
②____,春风不度玉门关。(王之涣《凉州词》)
③____,正是河豚欲上时。(苏轼《惠崇〈春江晚景〉二首》)
④求之不得,寤寐思服,____,辗转反侧。(《诗经•关雎》)
⑤蒹葭凄凄,____,所谓伊人,在水之湄。(《诗经•蒹葭》)
⑥且壮士不死即已,死即举大名耳,____?(司马迁《陈涉世家》)
⑦鸢飞戾天者,望峰息心;____,窥谷忘反。(吴均《与朱元思书》)
⑧《岳阳楼记》中体现范仲淹远大政治抱负的诗句是____,____。
如果关于x的一元二次方程kx2-2k+1x+1=0有两个不相等的实数根,那么k的取值范围是( )
阅读理解(Mr. Zhang is showing Wei Fang and Li Lei a modern factory.)Mr. Zhang: You can’t see many workers here, but you can see a lot of robots. Look, that robot has two big hands.Wei Fang: How strong it looks!Mr. Zhang: Yes. It does much work for us.Li Lei: There are so many big boxes here. What are the robots doing?Mr. Zhang: They are making fridges.Wei Fang: How fast they are working!Li Lei: How much time do they need to make a fridge, Mr. Zhang?Mr. Zhang: About five minutes.Wei Fang and Li Lei: Only five minutes! What a modern factory it is!
小明用凸透镜、蜡烛、光屏和光具座等实验器材,探究凸透镜成像的规律.