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2019年9月17日，北京2022年冬奥会和冬残奥会吉祥物发布仪式在北京首钢园区国家冬季运动训练中心冰球馆隆重举行，发布了北京冬奥会吉祥物“_________”。 （    ）

   （Graphical User Interface，GUI）是又称图形用户接口，是指采用显示的计算机操作用户界面。

 测定铁制品中铁的质量分数

铁是常用的金属材料，兴趣小组的同学对某铁制品中的质量分数进行测定．称取3g铁屑，缓慢加入一定溶质质量分数的硫酸溶液，直到过量（假设除铁以外的物质都不与硫酸反应），实验数据如图所示．

请计算：

看图片，连—连。

⑴    ⑵     ⑶

⑷     ⑸

A. doctor    B. teacher    C. parents    D. cook    E. study

⑹    ⑺     ⑻

⑼     ⑽

F. glasses    G. long hair    H. bedroom    I. big eyes    J. bathroom

计算：．

请写出一个y随x增大而增大的正比例函数表达式，y=

物理学中经常看到形如x＝ 的公式。一种情形是x的大小与y、z都有关；另一种情况是x虽然可由y、z计算，但与y、z无关。下列四个公式中，属于前一种情形的是（   ）

—______ does it take you to get there?

—About 30 minutes.

甲组人数是乙组人数的2倍，从甲组抽调8人到乙组，这时甲组剩下的人数恰比乙组人数的一半多2个，设乙组原有x人，则可列方程(    )．

辛亥革命爆发时，孙中山远在海外，事先并未料到起义发生，更不曾参与其事，但我们依然说辛亥革命的领导者是孙中山先生——因为火种早已被孙中山种下。属于“火种”的是（    ）

What is she likes?

旗杆及升旗台的剖面如图所示，MN、CD为水平线，旗杆AB⊥CD于点B．某一时刻，旗杆AB的一部分影子BD落在CD上，另一部分影子DE落在坡面DN上，已知BD＝1.2m，DE＝1.4m．同一时刻，测得竖直立在坡面DN上的1m高的标杆影长为0.25m（标杆影子在坡面DN上），此时光线AE与水平线的夹角为80.5°，求旗杆AB的高度．（参考数据：sin80.5°≈0.98，cos80.5°≈0.17，tan80.5°≈6）

把物体直接放在显微镜下，可以观察物体的微细结构。

The        teachers want to try some        soup.  

李四不爱吃蔬菜和水果，最近刷牙经常牙龈出血，你认为体内可能缺乏（   ）

完形填空

    For centuries, Beijing has been one of China's most important cities. 1a place for emperors and officials, today it is an international city and a popular tourist2. People from all over the country are moving to Beijing to 3 jobs and opportunities as this exciting city is a place where dreams can come true. Throughout the city, 4 dressed business people 5for their offices, mobile phones held to their ears and visitors can only watch and imagine the deals and 6being made at that very second.

    Beijing's streets provide a fascinating 7of the past and the present. In tea houses, groups of old men play chess 8the Macdonald's next door is filled with laughing teenagers sipping milkshakes. Walking through the broad streets 9with designer stores and multi-storey skyscrapers, you can 10 a turn and suddenly find yourself in a century's old 11 where a fruit seller chats happily to an old woman sitting in the sun. Many of the road signs and advertising billboards are now in 12, making Beijing more 13to foreigners. Public transport is efficient, new businesses are14, and every modern convenience and international brand is15in this booming global city.

    Beijing has some of China's most stunning 16. Visitors often come to Beijing with the single 17to see the Great Wall, one of the ancient wonders of the world, but once they've arrived, they realize that this is only one of the city's 18. In fact, what visitors ever seem to only19about Beijing, is that they simply20time before seeing it all.

下列有关胚胎发育过程的叙述错误的（   ）

命题p：菱形的对角线互相垂直，则p的否命题是， p是．

下面是人体呼吸系统、循环系统及泌尿系统的部分结构示意图，分析回答问题：

用简便方法计算。