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【简答题】
小红和小明在探究影响滑动摩擦力大小的因素时,小红设计了如图所示的三次实验. (1)实验要求用弹簧测力计拉着木块沿水平方向做 直线运动,根据 原理,可知此时摩擦力与拉力二力大小相等,否则弹簧测力计的示数不等于摩擦力。 (2)在甲图示数实验中,弹簧测力计的示数为 N. (3)比较甲、实验,可以得出结论:当接触面粗糙程度一定时, ,滑动摩擦力越大。 (4)比较 两次实验,可以得出结论:当压力大小一定时,接触面越粗糙,滑动摩擦力越大。(5)小明仔细观察了小红的实验过程,发现除实验次数少之外,还存在着不足,请你帮小明写出其中一条:
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【单选题】患儿，女，8个月，腹泻2天，大便每天10～20次，黄色稀水样便，伴有发热，体温38℃左右，轻咳，流涕，近4小时未排尿。查体：体温37.7℃，脉率148次/分，体重7kg，精神萎靡，前囟及眼窝明显凹陷，心肺无异常。腹部平软，无包块，肠鸣音活跃。皮肤弹性极差，四肢冷。大便常规：白细胞0～2/HP，余正常。对该患儿进行的下列处理措施不妥的是（　）
A.
查血气分析
B.
开通静脉通路
C.
庆大霉素4万U保留灌肠
D.
检测血压、心率
E.
采集大便标本，马上送检
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【单选题】-I'm sorry. I at you. the other dayForget it. It was a bit out of control myself.
A.
shouldn't shout
B.
shouldn't have shouted
C.
mustn't shout
D.
mustn't have shouted
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【判断题】旋转矢量法可以模拟谐振
A.
正确
B.
错误
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【单选题】Client: Hello. May I speak to Mr. Turner? Secretary: ______
A.
I'm sorry. He's at a meeting right now.
B.
Speaking, please.
C.
Hello. Who're you, please?
D.
Hello. Thank you for calling.
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【单选题】If Mary prefers bananas to plums and plums to peaches, but is indifferent between bananas and oranges, she
A.
prefers oranges to peaches
B.
prefers plums to oranges
C.
is indifferent between oranges and plums
D.
is indifferent between oranges and peaches.
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【单选题】j货真价实是(、)的重要组成部分
A.
职业道德
B.
社会道德
C.
公平交易
D.
注重信誉
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【单选题】听力原文：Man: I know I'm late. I'm sorry. I left home early, but traffic was tied up all over the city because of the weather, and my bus was late again. Woman: That may be, but this has really gone too f...
A.
He walks.
B.
He takes abus.
C.
He rides a train.
D.
He drives a car.
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【单选题】Mary prefers______.
A.
sing and dance
B.
singing to dancing
C.
to sing to dance
D.
to sing than dancing
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【单选题】下列哪一项不属于大数据的特点()。
A.
成本高
B.
数量大
C.
多样
D.
高速
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【单选题】Jenny is interested ______ math while Mary prefers English ______ math. [     ]
A.
at; on
B.
about; on
C.
in; to
D.
at; in
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相关题目：
【单选题】患儿，女，8个月，腹泻2天，大便每天10～20次，黄色稀水样便，伴有发热，体温38℃左右，轻咳，流涕，近4小时未排尿。查体：体温37.7℃，脉率148次/分，体重7kg，精神萎靡，前囟及眼窝明显凹陷，心肺无异常。腹部平软，无包块，肠鸣音活跃。皮肤弹性极差，四肢冷。大便常规：白细胞0～2/HP，余正常。对该患儿进行的下列处理措施不妥的是（　）
A.
查血气分析
B.
开通静脉通路
C.
庆大霉素4万U保留灌肠
D.
检测血压、心率
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采集大便标本，马上送检
查看完整题目与答案
【单选题】-I'm sorry. I at you. the other dayForget it. It was a bit out of control myself.
A.
shouldn't shout
B.
shouldn't have shouted
C.
mustn't shout
D.
mustn't have shouted
查看完整题目与答案
【判断题】旋转矢量法可以模拟谐振
A.
正确
B.
错误
查看完整题目与答案
【单选题】Client: Hello. May I speak to Mr. Turner? Secretary: ______
A.
I'm sorry. He's at a meeting right now.
B.
Speaking, please.
C.
Hello. Who're you, please?
D.
Hello. Thank you for calling.
查看完整题目与答案
【单选题】If Mary prefers bananas to plums and plums to peaches, but is indifferent between bananas and oranges, she
A.
prefers oranges to peaches
B.
prefers plums to oranges
C.
is indifferent between oranges and plums
D.
is indifferent between oranges and peaches.
查看完整题目与答案
【单选题】j货真价实是(、)的重要组成部分
A.
职业道德
B.
社会道德
C.
公平交易
D.
注重信誉
查看完整题目与答案
【单选题】听力原文：Man: I know I'm late. I'm sorry. I left home early, but traffic was tied up all over the city because of the weather, and my bus was late again. Woman: That may be, but this has really gone too f...
A.
He walks.
B.
He takes abus.
C.
He rides a train.
D.
He drives a car.
查看完整题目与答案
【单选题】Mary prefers______.
A.
sing and dance
B.
singing to dancing
C.
to sing to dance
D.
to sing than dancing
查看完整题目与答案
【单选题】下列哪一项不属于大数据的特点()。
A.
成本高
B.
数量大
C.
多样
D.
高速
查看完整题目与答案
【单选题】Jenny is interested ______ math while Mary prefers English ______ math. [     ]
A.
at; on
B.
about; on
C.
in; to
D.
at; in
查看完整题目与答案