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【单选题】
有关胸廓的描述错误的是
A.
成人胸廓呈圆锥形
B.
上口窄下口宽
C.
小于前后径
D.
胸廓下口被膈封闭
E.
胸廓由十二对肋骨、十二块胸椎、一块胸骨借骨连结组成
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举一反三
【单选题】import time scale = 10 print("------执行开始------") for i in range(scale+1): a = '*' * i b = '.' * (scale - i) c = (i/scale)*100 print("{:^3.0f}%[{}->{}]".format(c,a,b)) time.sleep(0.1) print("------执行结束...
A.
当i=2是,*被赋值2次
B.
当i=2是,.被赋值8次
C.
当i=2是,c=40
D.
当i=2是,c=20
【多选题】CNC铣床伺服电机出现过热产生报警,可能的原因是( )。
A.
电机过载
B.
频繁正、反转运动
C.
未输入电机电源
D.
电机线圈绝缘不良
【单选题】启动一个前台线程import threadingimport timeimport randomdef reading(): for i in range(5): print("reading",i) time.sleep(random.randint(1,2))r=threading.Thread(target=reading)__________________r.start()...
A.
r.setDaemon(True)
B.
r.setDaemon(true)
C.
r.setDaemon(False)
D.
r.setDaemon(false)
【判断题】import threadingimport timelock=threading._RLock()words=["a","b","d","b","p","m","e","f","b"]def increase(): global words for count in range(5): lock.acquire() print("A acquired") for i in ...
A.
正确
B.
错误
【简答题】Under CMR convention, the carrier is responsible for loss of or damage to the goods occurring between the time he takes over the goods and the time of delivery as well as for any delay in delivery. ( ...
【单选题】程控数字交换机中的硬件动作由软件进行控制。软件由两大部分组成()。
A.
程序和信令
B.
程序和数据
C.
信令和数据
D.
程序和指令
【单选题】My brother and I ___ goo tennis players.
A.
am
B.
is
C.
are
【多选题】CNC铣床伺服电机出现过热产生报警,可能的原因是( )。
A.
电机过载
B.
电机线圈绝缘不良
C.
频繁正、反转运动
D.
未输入电机电源
【单选题】关于城市水环境的特点,下列说法正确的是()。
A.
淡水资源的无限性
B.
城市水环境的独立性
C.
地表水的循环性
D.
城市水环境系统自净能力的有限性
【单选题】Most American newspapers try to entertain their readers because______.
A.
they have to keep up a good relation with them
B.
they have to compete with television
C.
they have to write about crime,sex and rumor
D.
they have to give factual news in an interesting way
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