通常将273K的温度和一个大气压的压力下的状态定为标准状态。

题型:判断题

问题:

通常将273K的温度和一个大气压的压力下的状态定为标准状态。

考点:合成氨装置操作工合成氨装置操作工题库
题型:判断题

The song named “Where does time fly” make me          my parents far away.

A.think of

B.thought of

C.think over

D.thought over

题型:判断题

一天,小明走进实验室,看到了一幅“不和谐”的画面(如图),围绕此瓶试剂是否变质的问题,展开了探究。

(1)小明提出下列猜想:

猜想一:如果试剂完全变质,则溶液中溶质是               

猜想二:如果试剂部分变质,则溶液中溶质是NaOH和Na2CO3

猜想三:如果试剂没有变质,则溶液中溶质是NaOH。

(2)写出NaOH发生变质的化学反应方程式:___________________________________。

(3)请你设计实验证实该试剂已经部分变质,完成探究方案:

实验步骤预期现象及结论
                                                                             
                                                                              
 

题型:判断题

D

Sitting on the peaceful coast of the Calapagon Islands. Ecuador , watching the sun move quietly into the sea, you shouldn’t forget the Charles Darwin (1809 – 1882) arrived here in 1835. He famous work. On the Origin of  Species. You can certainly follow Darwin’s footsteps and enjoy a trip from four to seven days to the islands.

The islands are centainly a paradise (天堂) for wildlife, as there are no natural killers on the islands and the number of beais and visitors is under govenment control.Though you cannot walk freely as Darwin die hour 200 years ago ,esch day is as impressive as it could be.

The most well crown animal of the Calapagos is the giant tortoisc ( 巨型陆龟),which can be seen moving slowly around the highlands of Sanra Cruz,the second largest island in the suchipelago.Some of these creatures are so old that they might have been seen in their youth by Darwin himself.

Despite strict control over activities and timing,you stay on the Galapagos will be remembered as a chain of incomparable pictures;diving with sea how that wim and play within inches of you; feeling small shaks touch you feet as you swim and ,most magically , seeing a with and her bady surface with great breath of air.

Travleing between the islands and observing the wildlife that so inspired Darwin , you will fell as though you are getting  a special view of an untouched world .At night you will sleep on board the ship , leaving the wildlife in complete occupation of the islands, which are as undisturbed now ai they have been since the beginning of time.

68.What do we know about Darwin’svisit to the istands.

A.studkd afleient cnt cpeatures on the islands.

B.He completed his famous book on the istands.

C.He was touched by the geographs of the istands.

D.He was attracted by well known animals of the islands.

69.Whieh of the fotlowing plavs a role in making the islands “a pradise for wikllife”?

A.Animals on theis lands feed on grass.

B.Lood go mthent forbids killing wildlife.

C.Fccple nninot visit the islands as they wash.

D.fourists are not allowed to torch the animals.

70.Your stay on the islands will be most impressive mainly because of           .

A.the beautiful sea views

B.Darwin’s inapiring trip

C.a clder view of animals

D.various daring activities

71.Which of the following would be the best title for the passage?

A.A Unique Attraction for Wildlife Lovers

B.Calapagos as a Paradise for Adventurers

C.Charles Darwin as a Symbol of Calapagos

D.A Successful Example of Wildlife Protection

题型:判断题

安全间隔期

题型:判断题

生产经营单位的应急预案按照针对情况的不同,可以分为()

A.综合应急预案

B.专项应急预案

C.现场处置方案

D.突发应急预案

E.重大应急预案

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