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【单选题】
风速是指单位时间内空气移动的水平距离。风速以米/秒（m/s）为单位，取一位小数。最大风速是指在某个时段内出现的（）。极大风速（阵风）是指某个时段内出现的最大瞬时风速值。瞬时风速是指三秒钟的平均风速。
A.
最大十分钟平均风速值
B.
十分钟平均风速
C.
二分钟平均风速
D.
最大二分钟平均风速值
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参考答案：
举一反三
【单选题】You _____ be tired; you have been working for so long a time, but he _____ be tired; he has just begun to work.
A.
may not; must
B.
must; may not
C.
can’t; must
D.
must; can’t
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【判断题】经验之塔是戴尔提出来的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】.He has __________________ the surroundings & now he is getting well on with his classmates;______________,he is treated as a normal student in the school.
A.
adjusted to ,at all
B.
adapted to,all in all
C.
fitted ,after all
D.
suitable for,in all
查看完整题目与答案
【简答题】A．He wants but he has no time now. B．He is leaving now, for he's not willing. C．He is reluctant. D．It is possible for him to do that now.
查看完整题目与答案
【单选题】He has _____ the surroundings and now he is getting well on with his classmates; _____, he is treated as a normal student in the school. [     ]
A.
adjusted to, at all
B.
adapted to, all in all
C.
fitted, after all
D.
suitable for, in all
查看完整题目与答案
【多选题】下列物质能与盐酸或硫酸反应生成盐的是()
A.
(CH 3 ) 2 NH
B.
C.
D.
(CH 3 ) 4 NOH
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【单选题】He has changed a lot: ______in the past he was extremely self-centered, now he has real concern for others.
A.
When
B.
However
C.
As
D.
Whereas
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【判断题】对生病客人住过的客房一定要进行严格的消毒处理,并对该客人住过的客房号码保密。
A.
正确
B.
错误
查看完整题目与答案
【简答题】X、Y、Z、W是短周期的四种元素，有关它们的信息如下表所示。 元素 部分结构知识 部分性质 X X原子核外电子占有9个原子轨道 X的一种氧化物是形成酸雨的主要物质 Y Y原子的次外层电子数等于最外层电子数的一半 Y能形成多种气态氢化物 Z Z原子的最外层电子数多于4 Z元素的最高正化合价与最低负化合价代数和等于6 W W原子的最外层电子数等于2n-3（n为原子核外电子层数） 化学反应中W原子易失去...
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【单选题】—John has spoken Japanese well now.    —______, and _____.
A.
So he has , so you have
B.
So he has , so have you
C.
So has he, so have you
D.
So has he, so you have.
查看完整题目与答案
相关题目：
【单选题】You _____ be tired; you have been working for so long a time, but he _____ be tired; he has just begun to work.
A.
may not; must
B.
must; may not
C.
can’t; must
D.
must; can’t
查看完整题目与答案
【判断题】经验之塔是戴尔提出来的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】.He has __________________ the surroundings & now he is getting well on with his classmates;______________,he is treated as a normal student in the school.
A.
adjusted to ,at all
B.
adapted to,all in all
C.
fitted ,after all
D.
suitable for,in all
查看完整题目与答案
【简答题】A．He wants but he has no time now. B．He is leaving now, for he's not willing. C．He is reluctant. D．It is possible for him to do that now.
查看完整题目与答案
【单选题】He has _____ the surroundings and now he is getting well on with his classmates; _____, he is treated as a normal student in the school. [     ]
A.
adjusted to, at all
B.
adapted to, all in all
C.
fitted, after all
D.
suitable for, in all
查看完整题目与答案
【多选题】下列物质能与盐酸或硫酸反应生成盐的是()
A.
(CH 3 ) 2 NH
B.
C.
D.
(CH 3 ) 4 NOH
查看完整题目与答案
【单选题】He has changed a lot: ______in the past he was extremely self-centered, now he has real concern for others.
A.
When
B.
However
C.
As
D.
Whereas
查看完整题目与答案
【判断题】对生病客人住过的客房一定要进行严格的消毒处理,并对该客人住过的客房号码保密。
A.
正确
B.
错误
查看完整题目与答案
【简答题】X、Y、Z、W是短周期的四种元素，有关它们的信息如下表所示。 元素 部分结构知识 部分性质 X X原子核外电子占有9个原子轨道 X的一种氧化物是形成酸雨的主要物质 Y Y原子的次外层电子数等于最外层电子数的一半 Y能形成多种气态氢化物 Z Z原子的最外层电子数多于4 Z元素的最高正化合价与最低负化合价代数和等于6 W W原子的最外层电子数等于2n-3（n为原子核外电子层数） 化学反应中W原子易失去...
查看完整题目与答案
【单选题】—John has spoken Japanese well now.    —______, and _____.
A.
So he has , so you have
B.
So he has , so have you
C.
So has he, so have you
D.
So has he, so you have.
查看完整题目与答案
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