收货人拒绝领取货物时，到站应按规定（）。 A.退回发站 B.及时通知发站和托运人征求

某相宜本草护肤品专柜计划在春节前夕促销甲、乙两款护肤品，根据市场调研，发现如下两种信息：

信息一：销售甲款护肤品所获利润y（元）与销售量x（件）之间存在二次函数关系y=ax²+bx．在x=10时，y=140；当x=30时，y=360．

信息二：销售乙款护肤品所获利润y（元）与销售量x（件）之间存在正比例函数关系y=3x．请根据以上信息，解答下列问题；

（1）求信息一中二次函数的表达式；

（2）该相宜本草护肤品专柜计划在春节前夕促销甲、乙两款护肤品共100件，请设计一个营销方案，使销售甲、乙两款护肤品获得的利润之和最大，并求出最大利润．

（96～98题共用题干）男性，35岁。支气管哮喘30年，再发咳嗽伴喘息3天，吸入沙丁胺醇症状稍改善，l天来喘息加重。查体：R 32次/分，端坐呼吸，大汗，语不成句，口唇发绀，双肺呼吸音低，可闻及散在哮鸣音，未闻及湿啰音，心率126次/分，有奇脉。

下列处理措施中，不恰当的是（ ）

A．鼻导管吸氧

B．静脉滴注糖皮质激素

C．持续雾化吸入β2受体激动剂

D．限制液体入量（＜2000lm/天）

阅读理解。

     In meditation (冥想),people sit quietly and focus their attention on their breath. As they breathe in and

out, they attend to their feelings. As thoughts go through their minds. they let them go. Breathe. Let go.

Breathe. Let go.

     According to a recent study at the Insight Meditation Society in Barre, Massachusetts, three months of

training in this kind of meditation causes a market change in how the brain allocates (分配) attention. It

appears that the ability to let go thoughts that come into mind frees the brain to attend to more rapidly

changing things and events in the outside world. Expert mediators are better than other people at catching

such fast-changing stimuli (刺激), like facial expressions.

     The study provides evidence for changes in the workings of the brain with mental training. People can

learn and improve abilities of all sorts with practice. everything from driving to playing the piano. The study

has shown that meditation is good for the brain, It appears to reduce pressure and promote a sense of

well-being.

     In an experiment, 17 volunteers with no meditation experience in the experimental group spent three

months meditating 10 to 12 hours a day. A control group also with no meditation experience meditated for

20 minutes a day over the same period. Both groups were then given the tests with two numbers in a group

of letters. As both group looked for the numbers, their brain activity was recorded. 

     Everyone could catch the first number. But the brain recordings showed that the less experienced

mediators tended to grasp the first number and hang onto it, so they missed the second number. Those with

more experience gave less attention to the first number. as if letting it go, which led to an increased ability

to grasp the second number, This shows that attention can change with practice.

     Just ask Daniel Levision, who meditated for three months as part of the study. " I am a much better

listener," he said. "I do not get lost in my own personal reaction to what people are saying."

1. The underlined word "them" in Paragraph 1 refers to ______.

A. feelings

B. minds

C. people

D. thoughts

2. Meditations manage their daily tasks better because they ______.

A. are given less pressure

B. allocate their attention better

C. have more stimuli for life

D. practice them more frequently

3. In the experiment, volunteers doing meditation for longer hours ______.

A. were more likely to catch both of the members

B. were used to memorizing numbers in groups

C. usually ignored the first number observed

D. paid more attention to numbers than to letters

4. The study proves that ______.

A. meditation improves one's health

B. brain activity can be recorded

C. human attention can be trained

D. mediators have a good sense of hearing

短周期元素X、Y、Z在周期表中的位置如图所示，则下列说法错误的是

A．X、Y、Z中X的单质最稳定

B．Y的氢化物为HY

C．能发生反应Cl₂+H₂Z = Z+2HCl

D．Y有一种含氧酸为HYO

在各国有关海上拖带合同的规定中，以下说法是正确的（）.

A.大多对承拖方的责任是任意的

B.少数国家实行指挥方负责的原则

C.有的国家实行一律由被拖方负责的原则

D.以上说法均正确