皮皮学，免费搜题
登录
搜题
【单选题】
在学习掷硬币的概率时，老师说：“掷一枚质地均匀的硬币，正面的概率是 ”，做了下列三个模拟实验来验证。 ①取一枚新硬币，在桌面上进行抛掷，计算正面的次数与总次数的比值 ②把一个质地均匀的圆形转盘平均分成偶数份，并依次标上奇数和偶数，转动转盘，计算指针落在奇数区域的次数与总次数的比值 ③将一个圆形纸板放在水平的桌面上，纸板正中间放一个圆锥（如下图），从圆锥的正上方往下撒米粒，计算其中一半纸板上的米粒数与纸板上总米粒数的比值 上面的实验中，不科学的有 [ ]A.
0个
B.
1个
C.
2个
D.
3个
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What can we infer from the two poor homeless men?
A.
They were begging for something to drink.
B.
They bought coffee so that they could find themselves a shelter.
C.
They were so annoying and scared people away.
D.
They were homeless and was asking the author for help.
【单选题】What will they possibly do after the party?
A.
Some of them will go the pub.
B.
They will drink some coffee somewhere.
C.
Stay with their families.
D.
Go to the cinema together.
【单选题】--- What’s wrong with my son, doctor? --- ____________ serious, just a slight cold. He’d better drink some water.
A.
Everything
B.
Nothing
C.
Something
D.
Anything
【单选题】—I’ll be travelling back from London so I can’t come to your party on Friday. — .Come round for a drink next week!
A.
I’m terribly sorry
B.
What a pity!
C.
I don’t really mind
D.
Please yourself
【简答题】耐摩擦色牢度测试中,如何选择摩擦头?
【简答题】由21÷7=3可知( )是( )和7的倍数,( )和7是( )的因数。
相关题目：