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【单选题】
关于下面代码的执行结果，哪个选项的描述是错误的？Turtle.setup(650,350,200,200)A.
建立一个长650、高350像素的窗体
B.
窗体中心在屏幕中的坐标值是(200,200)
C.
窗体顶部与屏幕顶部的距离是200像素
D.
窗体左侧与屏幕左侧的距离是200像素
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【单选题】After the trainer was sure that the whale could look after itself, he __________it into the sea.
A.
transported
B.
unloaded
C.
released
D.
handled
【单选题】what is the man's problem?
A.
He has a headache.
B.
He failed his history exam.
C.
He is tired.
D.
He is too busy.
【单选题】After his initial discovery, Baekeland ______.
A.
continued to improve varnish
B.
did many experiments that were aimed at finding a method to shape plastic
C.
did a series of successful experiments and soon worked out a method of molding plastic
D.
did many experiments, the results of which indicated that plastic could never be softened
【单选题】What’s wrong with the man?
A.
Hc’s got a cold．
B.
He feels cold．
C.
He has a headache．
【简答题】听材料，回答问题。 1. What's wrong with Jack? A. He has a headache. B. He has a sore throat. C. He has a stomachache. 2. How long has he been like this? A. For two hours. B. For two days. C. For only one hour....
【简答题】内蒙古最大的湖泊是什么
【简答题】设外部有一脉冲信号源PLUS，要求用8253—5的计数器0对该信号源连续计数，当计数器计为0时向CPU发出中断请求。 1、画出8253-5的CLK0、GATE0和OUT0的信号连接图。 2、若该芯片的端口地址为40H～43H，计数初值为1234H，写出该计数器工作在方式2按二进制计数的初始化程序。 3、若计数初值为12345H，在上述基础上增加计数器1如何连接以实现计数。
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