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Have you ever stayed in a hotel? Most Chinese hotels often provide guests with things like disposable( 一次性的 ) toothbrushes, toothpaste, shampoo and slippers. Many guests like the idea because they don’t have to bring their own. But, if you travel to Beijing, remember to bring your own things. Starting from June, some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things. Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources and is very bad for the environment. Do you know, one Chinese person makes as much as 400kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again. Back at home and school, you can also do something to make our world a better place. Try to do these things in your daily life. Use cloth shopping bags, not plastic ones. After using a plastic bag, wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school canteen, use your own bowl and chopsticks instead of disposable ones.
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参考答案:
举一反三
【单选题】函数Len("沈阳师范大学2016.1.1")返回的值是______。
A.
6
B.
10
C.
14
D.
16
【单选题】25℃时,在1.0 L浓度均为0.01 mol·L -1 的某一元酸HA与其钠盐组成的混合溶液中,测得 c(Na + )>c(A - ),则下列描述中,不正确的是(  )
A.
该溶液的pH<7
B.
HA的酸性很弱,A - 水解程度较大
C.
c(A - )+c(HA)=0.02 mol·L -1
D.
n(A - )+n(OH - )=0.01 mo1+n(H + )
【单选题】下面关于人体稳态的调节的叙述,不正确的是 [     ]
A.
下丘脑对水的平衡、体温的相对恒定、血糖稳态都有调节作用
B.
正常人发高烧时,失水多于失盐,这时其渴觉中枢受抑制,抗利尿激素分泌会减少
C.
正常人在寒冷环境中,机体内甲状腺激素和肾上腺激素的分泌量会增加
D.
水分的平衡、无机盐的平衡、体温的相对恒定都与人体皮肤有关
【单选题】与肝硬化腹水形成机制无关的是
A.
心房利钠肽过度分泌
B.
血浆胶体渗透压下降
C.
醛固酮及抗利尿激素增多
D.
有效循环血容量不足
E.
门静脉压力升高
【单选题】圆曲线的起点通常用什么代号表示 ()
A.
YZ
B.
ZY
C.
QZ
D.
JD
【单选题】圆曲线的起点的代号通常用( )表示
A.
YZ
B.
QZ
C.
ZY
D.
JD
【单选题】下面关于人体稳态调节的叙述,不正确的是 ( )
A.
下丘脑对水的平衡、体温的相对恒定、血糖的平衡都有调节作用
B.
人在发高烧时,失水多于失盐,这时其渴觉中枢受抑制,抗利尿激素分泌量会减少
C.
正常人在寒冷环境中,机体内甲状腺激素和肾上腺素的分泌量会增加
D.
水分的平衡、无机盐的平衡、体温的相对恒定都与人体皮肤有关
【单选题】利润是边际贡献和 ( )的差额。
A.
固定成本总额
B.
变动成本
C.
成本总额
D.
销售收入
【单选题】与肝硬化腹水形成机制无关的是
A.
门静脉压力升高
B.
有效循环血容量不足
C.
心房利钠肽过度分泌
D.
醛固酮及抗利尿激素增多
E.
血浆胶体渗透下降
【单选题】尿量增多的机制与抗利尿激素无关的是
A.
循环血量增加
B.
血浆晶体渗透压降低
C.
大量饮水
D.
静脉输入低渗液体
E.
静脉输入甘露醇
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