下列根据实验操作和现象所得出的结论正确的是() 选项实验操作实验现象结 论A向两

题型:选择题

问题:

下列根据实验操作和现象所得出的结论正确的是(    )

选项实验操作实验现象结 论
A向两份蛋白质溶液中分别滴加饱和NaCl溶液和CuSO4溶液均有固体析出蛋白质均发生变性
B将少量某无色气体通入澄清石灰水出现白色沉淀该气体一定是CO2
C分别用测定常温下0.1 mol·L--1 Na2SiO3和Na2CO3的PHPH:Na2SiO3﹥Na2CO3非金属性Si﹥C
D向浓度均为0.1 mol·L-1NaCl和NaI混合溶液中,

滴加少量AgNO3溶液

出现黄色沉淀Ksp(AgCl)>Ksp(AgI)
 

考点:设计实验方案及探究实验
题型:选择题
Nowadays many people go abroad. Then they must learn some customs about the country because different countries have different customs. In order that we can learn more about customs, the Culture Palace has invited some foreign speakers to give us speeches. Here is the timetable.
Speaker:Mr Smith (From America)
Speech: Table manners in America
Place: Room 1204 in Culture Palace
Time:7:30~9:30p.m.on Tuesday, March 3rd
Ticket Price : ¥25
Speaker:Mrs White (From England)
Speech: Who pays for the meals in England?
Place: Room 3218 in Culture Palace
Time:8:00~10:00p.m.on Wednesday March 4th
Ticket Price : ¥20
Speaker:Mr Brown (form Australia)
Speech: How to be a polite person in Australia?
Place: the Culture Hal
Time:7:30~10:00p.m.on Tuesday, March 5th
Ticket Price : ¥15
Speaker:Mrs Black(From Germany)
Speech:Good manners in Germany
Place: Room 320 in Culture Palace
Time:7:30~9:00p.m.on Friday, March 6th
Ticket Price : ¥20
小题1:The Culture Palace invites some foreign speakers to give speeches, because __________.
A.people are interested in western culture
B.people want to communicate with foreigners more
C.it may make people learn English much harder
D.people should know more about foreign customs
小题2:Mr Smith comes from_________.
A.AmericaB.EnglandC.AustraliaD.Germany
小题3:If you want to go to England on business, you can attend the speech in __________.
A.Room 1240 in Culture Palace
B.Room 3218 in Culture Palace
C.the Culture Hal
D.Room 320 in Culture Palace
小题4:How much is it if someone wants to listen to all the speeches?
A.¥20B.¥ 35C.¥60D.¥80
小题5:Which of the following is true according to the timetable?
A.Mr. Smith is going to give a speech on who pays for the meals in England.
B.Mrs. White will give a speech in Room 3218 in the Culture Hall on Tuesday.
C.Mr. Brown will give the speech “How to be a polite person in Australia” in the Culture Hall.
D.Mrs. Black will give a speech on good manners in Germany on March 5th.
题型:选择题

免疫自稳功能包括()

A.清除体内变性、衰老、损伤的细胞

B.杀伤、清除体内的突变细胞,防止肿瘤发生

C.防止自身免疫病发生

D.清除体内病原微生物

E.抑制体内病原微生物生长繁殖

题型:选择题

对于特约商户的交易单据收单行应及时收取并妥善保管,保管期限为()。

A.自交易日起至少12个月

B.自交易日起至少24个月

C.自收取单据之日起至少12个月

D.自收取单据之日起至少24个月

题型:选择题

派生类构造函数的执行顺序是先执行 12 的构造函数,然后执行成员对象的构造函数,最后执行 13 的构造函数。

题型:选择题

以下哪种情况一般有可能设计单端固定桥()

A.上颌侧切牙缺失

B.上颌尖牙缺失

C.第二、三磨牙缺失

D.第一、二磨牙缺失

E.间隔缺失

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