Experiments of this kind ____ in both the U.S. and Europe well before the World War.A have conductedB have been conductedC had conductedD had been conducted
题目
A have conducted
B have been conducted
C had conducted
D had been conducted
相似考题
更多“Experiments of this kind ____ in both the U.S. and Europe well before the World War. ”相关问题
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第1题：
plot(kind='box')通过kind参数指定绘图类型,支持()绘图。A.barh
B.bar
C.hist
D.line
正确答案：ABCD
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第2题：
下列语句中正确的是
A．char*myString="Hello-World!"；
B．char myString="Hello-World!"；
C．char myString[11]=”Hello-World!”；
D．char nlyString[12]="Hello-World!"；
正确答案：A
解析：选项C、D的数组下标超界；对于选项B，不能将字符串赋值给字符，可以将一个字符串赋值给字符指针，指针指向字符数组的首地址。 -
第3题：
13、Java程序向显示器输出信息“Hello, World”，下列哪种写法是错误的？
A．System.out.print(“Hello, world” );
B．System.out.println(“Hello, world” );
C．System.out.print(“Hello, world\n” );
D．printf(“Hello, world\n” );
public class test{public static void main(String[] args){System.out.println('Hello!');}} -
第4题：
下列字符型常量Hello,world!表示方法中，错误的是______。
A．[Hello,world!]
B．'Hello，wOrld!'
C．Hello,world!，
D．{Hello,world!}
正确答案：D
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第5题：
John has always remained loyal to his family and friends.A:friendly
B:faithful
C:hostile
D:kind答案：B解析：本句意思：约愉总是忠于他的家庭和朋友。loyal意为“忠诚的，诚实的”，与faithful (忠诚的）意思相近。friend行友好的，友善的；hostil。有敌意的；kind热心的。 -
第6题：
pandas中也有专门针对数据框x的绘图函数pandas.DataFrame.plot（)，如绘制条形图的是_______。
A．import pandas as pd x.plot(kind='pie',ax=axes[0])
B．import pandas as pd x.plot(kind='boxplot',ax=axes[0])
C．import pandas as pd x.plot(kind='scatter',ax=axes[0])
D．import pandas as pd x.plot(kind='bar',ax=axes[0])
D