作物需水量包括（）、（）和（）。

设a，b，c∈R，有下列命题：

①若a＞0，则f（x）=ax+b在R上是单调函数；

②若f（x）=ax+b在R上是单调函数，则a＞0；

③若b²-4ac＜0，则 a³+ab+c≠0；

④若a³+ab+c≠0，则b²-4ac＜0．

其中，真命题的序号是______．

下列词语中没有错别字的一组是（     ）

A．沧桑帐款玉砌雕栏目不遐接

B．急躁跌宕一愁莫展锱铢必较

C．蛰伏遗憾天理昭彰势不可挡

D．昵称船仓变换莫测厥功甚伟

Senior citizens are permitted to travel cheaply on a bus if they have a special card. Women may get cards when they are sixty.

Mrs. Matthews lived in the country but she went into town once a week to buy food and other things for the house, and she usually went by bus. She always had to pay the full price for her ride.

Then she reached the age of sixty and got her senior citizen’s card, but when she used it for the first time on the bus, it made her feel very old.

The bus driver had often seen her traveling on the bus before, and he noticed that she was feeling unhappy, so after she had paid her money, he winked at her and whispered, “Don’t forget to give your mother’s card back to her when you see her again.”

Mrs. Matthews was very happy when she heard this.

小题1:Senior citizens in the story refer to       .

A．those who have special cards

B．old people with special cards

C．people who hold high positions in the government

D．those who wanted to travel cheaply小题2:Women over sixty       .

A．don’t have to pay for taking buses

B．pay less for their ride if they have a special card

C．have to pay the full price for their ride

D．have to pay their special card小题3:Mrs. Matthews used to pay the full price for her ride because    .

A．she didn’t know the rule

B．she wasn’t old enough

C．she didn’t know where to get the card

D．she had reached sixty but had not got her senior citizen card小题4:Mrs. Matthews felt unhappy on the bus because      .

A．she still had to pay for the ride

B．the card wasn’t hers

C．she felt she was now an old woman

D．the driver found out she was not honest小题5:The driver whispered to her      .

A．in order to make her feel younger

B．because he thought that she shouldn’t have borrowed her mother’s card

C．because he wanted her to pay the full amount

D．because he knew her mother was still alive

男性，45岁，体胖，平常食欲佳。近1个月饮水量逐渐增多，每日约1500ml，尿量多，空腹血糖6.7mmol/L（120mg/dl），尿糖（+），应做哪些检查来确诊糖尿病（）

A.24小时尿C肽测定

B.24小时尿糖定量

C.皮质激素葡萄糖耐量试验

D.葡萄糖耐量试验

E.24小时尿糖定量

（）是指生水经过各种水处理工艺处理后，补充锅炉汽水损失的水。

A.凝结水

B.原水

C.补给水

D.锅水