题目:
老窑探放水原则是什么?
答案:
参考答案:
综合考虑,以“安全、经济、合理”为原则,视具体情况还可细分为:
(1)积极探放;
(2)先堵后探放;
(3)先降压后探放;
(4)先隔离后探放。
老窑探放水原则是什么?
参考答案:
综合考虑,以“安全、经济、合理”为原则,视具体情况还可细分为:
(1)积极探放;
(2)先堵后探放;
(3)先降压后探放;
(4)先隔离后探放。
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 the environment will be. 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(食堂), use your own bowl and chopsticks instead of disposable ones.
小题1:Why do many hotels provide guests with some disposable things?
A.Let their guests be convenient during their travelling.
B.Hope their guests use less disposable things.
C.Wish their guests to save money.
D.Want their guests to use more disposable things.小题2:Some Beijing hotels will no longer provide guests with _______.
A.cheap food and drink
B.disposable things
C.good service
D.free TV programmes小题3:Which of the following is NOT true?
A.Many disposable things are made of plastic.
B.Throwing disposable things away is a waste of natural resources.
C.Plastic is very bad for the environment.
D.Plastic breaks down easily.小题4:What can we do to make our world a better place at home and school?
A.Use shopping bags made of plastic.
B.Do not throw away paper cups.
C.Use disposable plates, bowls and chopsticks.
D.Do not forget to reuse daily necessities(日用品).小题5:We can tell from the story that _________.
A.people don't like disposable things at all
B.we can't use paper or plastic bowls at school
C.we should use less plastic things and protect our environment
D.hotels won't provide disposable things because they want to save money
下列繁殖过程中,属于无性生殖的是
①潍坊用萝卜的根尖组织,培育出萝卜幼苗②诸城板栗和青州蜜桃的实生苗繁殖③试管婴儿的诞生④将甲兔的乳腺细胞核,融合到乙兔的去核卵细胞中,由该细胞发育成新个体[ ]
A.①②
B.①③
C.①④
D.②④
下列霍乱休克抢救措施中错误的是
A.尽快扩容治疗
B.大量应用缩血管性血管活性药物是升血压的关键
C.必要时加用激素
D.及时补充电解质
E.急性肺水肿心力衰竭者用强心剂毛花苷
齿轮综合公差是齿厚公差与齿轮跳动公差之和。()
虎杖具有而大黄不具有的功效是
A.泻下攻积
B.活血散瘀
C.化痰止咳
D.清热解毒