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【判断题】
温度变化等因素引起的参数变化,相当差分放大电路的两个管子中输入了一对大小相等、方向相同的共模信号。
A.
正确
B.
错误
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【单选题】阅读下列程序: public class ThreadTest5 extends Thread{ int i = 0; public static void main(String[] args){ Thread t1 = new ThreadTest5(); t1.start(); } public void run( ){ while( i<=2 ){ System.out.println("...
A.
程序不能通过编译,因为在ThreadTest5类中不能定义两个run()方法
B.
程序运行结果为:i = 0 i = 1 i = 2
C.
程序运行结果为:j = 6 j = 7
D.
程序运行结果为:i = 0 i = 1 j = 6 i = 2 j = 7
【判断题】有机化合物分子中的碳、氮、氧等原子上引入烃基,也可以取代烷基的反应称为烷基化反应
A.
正确
B.
错误
【简答题】有机化合物分子中的碳原子可分为()、()、()、()4种类型
【单选题】What should non-scientists do to ensure their quality of life?
A.
Seek personalized medical assistance from doctors.
B.
Acquire a basic understanding of medical science.
C.
Have their individual genome sequenced.
D.
Make informed use of animal models.
【简答题】50. What does the author say about midlife today? (2.0分)A. It is more meaningful than other stages of life. B. It is likely to change the narrative of one’s life. C. It is more important to those with...
【单选题】某个应用程序的main方法中有下面的语句,输出结果为( )String s="ABCD";s.concat("E");s.replace('C','F');System.out.println(s);
A.
ABCDEF
B.
ABFDE
C.
ABCDE
D.
ABCD
【简答题】(8分)在有机化合物分子中,常把连有4个不同的原子或原子团的饱和碳原子称为不对称碳原子,可用*C标记,例如: 丙烷进行氯代反应中,可分离出4种二氯代物A、B、C、D,分子式均为C 3 H 6 Cl 2 。当它们进一步氯代为三氯代物时,A只有一种三氯代物,B有2种三氯代物,C和D各有3种三氯代物,已知C具有不对称碳原子,试写出A、B、C、D的结构简式:A________ B___________ C...
【简答题】在有机化合物分子中,可根据一个碳原子所连的碳原子数目不同,可把碳原子分为 、 、 、 碳原子。
【单选题】The passage suggests that an assumption underlying non-economist social scientists dismal of economics as dismal is that
A.
positive-sum outcomes cannot, by the definition of the power model, exist
B.
all social sciences founded on pragmatism instead of idealism are dismal
C.
zero-sum interactions models are inherently optimistic in their view of the future
D.
scarcity does not necessarily exist as a controlling factor in social systems
E.
economics is anti-utopian by nature, proposing a more realistic view of the future
【判断题】Dictation: Many non-scientists are helping with the research by examining satellite images.
A.
正确
B.
错误
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