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【单选题】
离心泵叶轮裂纹或蚀不严重焊补修复，下列说法不正确的是( )。
A.
预热至600℃左右，先挂锡再黄铜气焊
B.
焊完好待缓慢冷却后机械加工
C.
加工后如静平衡试验不合格应补焊
D.
静平衡试验不合格可铣去部分盖板校正
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举一反三
【判断题】奴隶社会的时候人们主要是采用结绳记事的方式进行统计工作的。
A.
正确
B.
错误
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【简答题】The days _______ you could travel without a passport are a thing of the past. A. in which B. on which C. of which D. at which
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【判断题】有组织排水 : 雨水经由天沟、水落管等排水装置被引导至地面或地下管沟
A.
正确
B.
错误
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【简答题】Cast your mind back to the past twenty years and hardly did anyone have their own email account. The Internet had just taken off in 1991 and people were only using office and PC­based email exchanges....
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【单选题】The ability to _____ one another for past wrongs is one of the greatest attributes that anyone should possess or exercise.
A.
explain
B.
forgive
C.
excuse
D.
apologize
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【单选题】Our town________poor in the past，but great changes________in the town in the past three years. [     ]
A.
was；had taken place
B.
was；have taken place
C.
has been；had taken place
D.
has been；have taken place
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【单选题】听力原文：M: Is there anyone available to help make a copy of my tape? W: No, not until tomorrow. But you can do it yourself by following the instructions on the machine. Q: What does the woman mean? (16)
A.
He can not make a copy because of the copyright.
B.
He can make his own copy.
C.
He should wait until tomorrow.
D.
He can not make a copy now.
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【单选题】The teacher will not let anyone leave the classroom until the bell ______.
A.
rings
B.
rang
C.
will ring
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【单选题】如图为某二倍体高等动物性腺中细胞分裂不同时期每个细胞内的核DNA、染色体、和染色单体的数量关系图。据此判断下列说法正确的是
A.
图中可表示细胞分裂间期的只有丁对应的时期
B.
处于图中甲对应时期的细胞应代表精细胞或卵细胞
C.
戊→丙和丁→乙的变化分别发生在有丝分裂和减数分裂过程中
D.
引起乙→丙和丁→戊变化的原因分别为同源染色体分离、着丝点分裂
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【单选题】It is necessary that anyone ______exercises every day if he wishes to keep healthy.
A.
do
B.
would do
C.
did
D.
will do
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相关题目：
【判断题】奴隶社会的时候人们主要是采用结绳记事的方式进行统计工作的。
A.
正确
B.
错误
查看完整题目与答案
【简答题】The days _______ you could travel without a passport are a thing of the past. A. in which B. on which C. of which D. at which
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【判断题】有组织排水 : 雨水经由天沟、水落管等排水装置被引导至地面或地下管沟
A.
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B.
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【简答题】Cast your mind back to the past twenty years and hardly did anyone have their own email account. The Internet had just taken off in 1991 and people were only using office and PC­based email exchanges....
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【单选题】The ability to _____ one another for past wrongs is one of the greatest attributes that anyone should possess or exercise.
A.
explain
B.
forgive
C.
excuse
D.
apologize
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【单选题】Our town________poor in the past，but great changes________in the town in the past three years. [     ]
A.
was；had taken place
B.
was；have taken place
C.
has been；had taken place
D.
has been；have taken place
查看完整题目与答案
【单选题】听力原文：M: Is there anyone available to help make a copy of my tape? W: No, not until tomorrow. But you can do it yourself by following the instructions on the machine. Q: What does the woman mean? (16)
A.
He can not make a copy because of the copyright.
B.
He can make his own copy.
C.
He should wait until tomorrow.
D.
He can not make a copy now.
查看完整题目与答案
【单选题】The teacher will not let anyone leave the classroom until the bell ______.
A.
rings
B.
rang
C.
will ring
查看完整题目与答案
【单选题】如图为某二倍体高等动物性腺中细胞分裂不同时期每个细胞内的核DNA、染色体、和染色单体的数量关系图。据此判断下列说法正确的是
A.
图中可表示细胞分裂间期的只有丁对应的时期
B.
处于图中甲对应时期的细胞应代表精细胞或卵细胞
C.
戊→丙和丁→乙的变化分别发生在有丝分裂和减数分裂过程中
D.
引起乙→丙和丁→戊变化的原因分别为同源染色体分离、着丝点分裂
查看完整题目与答案
【单选题】It is necessary that anyone ______exercises every day if he wishes to keep healthy.
A.
do
B.
would do
C.
did
D.
will do
查看完整题目与答案