从甲、乙两班分别任意抽出10名学生进行英语口语测验,其测验成绩的方差分别为S12

题型:选择题

问题:

从甲、乙两班分别任意抽出10名学生进行英语口语测验,其测验成绩的方差分别为S12= 13.2,S22=26.26,则

A.甲班10名学生的成绩比乙班10名学生的成绩整齐

B.乙班10名学生的成绩比甲班10名学生的成绩整齐

C.甲、乙两班10名学生的成绩一样整齐

D.不能比较甲、乙两班10名学生成绩的整齐程度

考点:简单随机抽样系统抽样分层抽样
题型:选择题

A woodcutter(伐木工) was working in the forest one day when he found a box full of gold coins. Unfortunately, his wife was the kind of woman who could not keep a secret. Somehow, he knew, he had to prevent(阻止) her from talking about the gold.

He thought about this for a long time, then had an idea.

“ I found something in the forest”, he told his wife, “come with me and I’ll show you.”.His wife followed him into the forest and soon they came to a tree.“ Look at that!” the woodcutter said to his wife, and pointed to the tree. “There’s a fish growing on that branch!” His wife was surprised ,especially when he climbed up the tree and brought down the fish for her to see.They walked on and soon came to the river. “I’ll just pull in my net and see what I’ve caught”, the woodcutter said.

He pulled in his net and inside there were several hares(野兔). “How interesting!” he said “there are now hares in the river.” After that, they came to where the woodcutter had found the box of gold. “Look, wife”, he said “this is what I have found. A box of gold coins.”

The next day, his wife could not stop herself from telling her friends about all the wonderful things she had seen.Of course, nobody believe her!

小题1:Where did the woodcutter find the box of gold?______

A.When he was working

B.In his garden

C.In the forest where he was working

D.On his farm fields, where he was farming小题2:Where do you usually see hares?______

A.In the street.

B.In the forest.

C.In the river.

D.In the sea.小题3:Why did his wife tell her friends what happened? Because ______

A.she was very surprised.

B.she wondered why the hares were in the river and fish was in the tree

C.she could not stop herself from talking about anything

D.she was very happy

题型:选择题

患者,75岁女性患帕金森病8年,其静止性震颤的特点不包括()

A.常为帕金森病的首发症状

B.睡眠时消失

C.可波及下颔、头部

D.随意运动时明显

E.表现为拇指、示指及中指搓丸样运动

题型:选择题

菜肴盘饰一般选用单色盘,包括()。

A.黑色盘

B.白色盘

C.米黄色盘

D.无色透明盘

E.对称花纹盘

题型:选择题

席勒把“浪漫诗”称作______

A.感伤诗
B.素朴诗
C.湖畔诗
D.田园诗

题型:选择题

不良叶种类有哪些?

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