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日常生活中，人们在购物、缴纳水、电、通信费等方面越来越多地使用支付宝、微信等方式支付。这表明（    ）

①人们已不使用现金进行消费

②货币固有的职能并没有改变

③流通中的货币量大幅减少

④支付方式多样化方便了生活

如图为配制 50g 溶质质量分数为 10%的氯化钠溶液的操作过程，下列有关操作与目的分析均正确的是（   ）

选项	操作	目的
A	用剩的食盐放回原试剂瓶	避免浪费
B	天平调平后在左、右托盘中各垫一张相同的纸	保证称取的食盐质量更准确
C	用 50mL 量筒代替天平量取所需的水	更加简便
D	溶解时用玻璃棒搅拌	增加食盐的溶解能力

阅读文言文，回答问题。

    士谦家富于财，躬处^①节俭，每以振施^②为务。州里有丧事不办者，士谦辄奔走赴之，________。有兄弟分财不均，至相阋讼^③ ， 士谦闻而出财，________，令与多者相埒^④。兄弟愧惧，更相推让，卒为善士。有牛犯其田者，士谦牵置凉处饲之，过于本主。望见盗刈其禾黍者，________。其家僮尝执盗粟者，士谦慰谕^⑤之曰：“穷困所致，义无相责。”遽^⑥令放之。

    开皇八年，终于家，时年六十六。赵郡士女闻之，莫不流涕曰：“我曹不死，而令李参军死乎！”会葬者万余人。乡人条其行状，诣尚书省请先生之谥，事寝不行，遂相与树碑于墓。

（选自《隋书·隐逸传》）

【注】①躬处：对待自己。②振施：救济施舍。③阋讼：诉讼。④相埒：相等。⑤慰谕：安慰。⑥遽：立刻，马上。

推动发展的第一动力是（    ）

设集合 ，则 （    ）

下列说法中正确的是（   ）

I often play with my dog.

Directions: For each blank in the following passages there are four words or phrases marked A, B, C, and D. Fill in each blank with the word or phrase that best fits the context.

    Keeping The Taps Running in Thirsty Cities

    Water covers 71% of Earth's surface yet only 2% of it is accessible as a source of fresh water. 1 on this limited resources is rising, a trend likely to continue.

    It is important to recognize that it is not just city residents who 2 water. Agriculture, industry and tourism often require more water than the municipal water supply. Globally, 70% of fresh water is 3 for agriculture, but locally in heavily irrigated(灌溉)areas this can increate to 90%. A healthy environment also requires fresh water, and the quality of available water is as important as its 4.

    Water stress is not always caused by physical shortages in dry areas. 5 for water resources between different users within river catchments or basins can also be a cause.

    Every thirsty city operates within its own context, 6 to the challenge of providing adequate water supplies. Cape Town, 7, has faced three years of drought during which winter rains failed to materialize. At the end of the 2017 rainy season the city faced the 8 of its dams running dry during 2018. The dams were only 37% full—in the same week four years before they were full to the top. In January 2018, it was 9 that Cape Town would reach Day Zero, when it would be forced to turn off the taps, in April. This was despite the city reducing its water use by more than half, from 1.2 billion litres a day in 2015 to fewer than 600 million litres, and working 10 with industry and agriculture to reduce demand.

    On February 1, the authorities put in place a strict limit of 50 litres of water per person per day. 11, in Britain this is considered enough for a five-minute shower of half a washing machine cycle on full load.

    In addition, a ban was placed on using 12 water for gardens, water management devices were installed at household with a high water use and the water pressure was reduced to cut demand and leaks. At the same, the city launched a media 13 to change habits and introduced higher duties. This is not without its costs; agriculture and tourism, both significant areas of employment, have 14. It is a classic example of the problem of water economics-the cost of water is low but the cost of a lack of water is very high.

    Crises such as the Cape Town drought are in danger of becoming the new norm. The 15 of Day Zero must serve as a wake-up call for cities across the world to develop cost-effective water management strategies to cope with an uncertain future.

如图，在四边形ACBM中，∠C=∠M=90°，∠CAB=∠MAB=60°，将△ABM绕点A顺时针旋转α（α＜∠BAC），得到Rt△ADE，其中斜边AE交BC于点F，直角边DE分别交AB，BC于点G，H．

需要制作一个具有如下功能的选答器：单选题有两个可供选择的答案，与两个答案对应的红、绿灯分别由S₁S₂两个开关控制，选择哪个答案就闭合对应的开关，使相应的灯发光。下列设计简图符合上述要求的是（   ）

—     did you go     vacation?

— I went to Shanghai.

81÷9＝9                                       （    ）

下列关于无机盐的叙述正确的是（    ）

欢乐世界的门票价格规定如下表．

人数/人	1﹣50	51﹣100	100以上
每人票价/元	148	128	98

阳光小学4（1）班和4（2）班一起去欢乐世界秋游.4（1）班有49人，4（2）班有52人．

下列说法错误的是（    ）

照样子，写句子。

例句：要是我有那么多钱就能吃得好穿得好住上大房子，为什么不说呢？

要是……就能……

冰壶是2022北京冬奥会的比赛项目，比赛场地如图所示。某次比赛时，运动员从起滑架处沿水平方向推着20kg的红色冰壶出发，在投掷线AB处放手让红冰壶以一定的初速度滑出。之后，冰壶沿虚线向圆垒运动，与对方置于圆垒中心O处的相同质量的蓝色冰壶发生正碰，碰后红、蓝冰壶分别沿虚线向前滑行0.2m和1.8m后停下。已知投掷线与O点间的距离为30m，起滑架与投掷线间的距离为10m，两冰壶与冰面间的动摩擦因数均为 ，取 ，将冰壶视为质点，求：

若函数 的极小值为 ，则a的值为 (   )

风靡全球的苹果手机，在研发过程中遭遇过许多困难，但苹果公司力克技术难关，不断推出苹果系列手机，其销量屡屡刷新记录。目前“十三香”上市。就此以下说法正确的是（   ）

下图示意世界部分地区气压带和风带分布。据此完成下面小题。