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【单选题】
Marrakech got independent in ( ).
A.
1949
B.
1947
C.
1956
D.
1984
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举一反三
【单选题】下列不属于补充养老保险特点的是
A.
补充养老保险是社会保障体系的重要组成部分
B.
补充养老保险的责任主体是国家机关、企事业单位等
C.
补充养老保险是一种员工福利制度
D.
补充养老保险是一种强制性保险
【单选题】关于遗传密码特点的描述,正确的是
A.
1个密码子可以编码多种氨基酸
B.
密码子间有1个核苷酸间隔
C.
1个氨基酸可以有多个密码子
D.
不同的生物采用组成不同的密码子
E.
AUG仅为起始密码,不编码氨基酸
【简答题】(14分)二氧化钛广泛应用于各类结构表面涂料、纸张涂层等,二氧化钛还可作为制备钛单质的原料。 Ⅰ.二氧化钛可由以下两种方法制备: 方法1:TiCl 4 水解生成TiO 2 ·xH 2 O,过滤、水洗除去其中的Cl - ,再烘干、焙烧除去水分得到粉体TiO 2 ,此方法制备得到的是纳米二氧化钛。 (1)①TiCl 4 水解生成TiO 2 ·xH 2 O的化学方程式为 。 ②检验TiO 2 ·xH 2...
【单选题】What is the finding of the new study?
A.
The gender divide is a big concern of the general public.
B.
Men and women understand economics quite differently.
C.
The gap between male and female economists needs to be closed.
D.
Male and female economists disagree widely on economic policy.
【单选题】若有两种模架,分别为点浇口基本型 DA 型和直浇口基本型 A 型,这两种模架属于不同的 ( ) 。
A.
型号
B.
系列
C.
规格
【简答题】Economics is not concerned solely with the optimum allocation of resources, but with wider questions of equity and the distribution of costs and benefits among individuals, regions, etc. It is thus co...
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
the fact that people of different nationalities or ethnical groups reside in different places
B.
why people of one type prefer to isolate themselves from those of another type
C.
peculiar characteristics of people from different countries in choosing living places
D.
what types of people like to move frequently and why they keep changing their living places
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
the fact that people of different nationalities or ethnical groups reside in different places
B.
why people of one type prefer to isolate themselves from those of another type
C.
peculiar characteristic of people from different countries in choosing living places
D.
what types of people, like to move frequently and why they keep changing their living places
【单选题】关于遗传密码的特点的描述,正确的是( )
A.
1个密码子可以编码多种氨基酸,
B.
密码子间有1个核苷酸间隔
C.
1个氨基酸可以有多个密码子
D.
不同的生物采用组成不同的密码子
E.
AUG仅为起始密码,不编码氨基酸
【单选题】The central concern of economics is
A.
poverty.
B.
scarcity.
C.
wealth accumulation.
D.
overconsumption.
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