开展省市口腔健康调查时用 A.普查 B.抽样调查 C.预调查 D.捷径

题型:单项选择题

问题:

开展省市口腔健康调查时用

A.普查
B.抽样调查
C.预调查
D.捷径调查
E.问卷调查

考点:口腔执业医师口腔执业医师80
题型:单项选择题

Welcome to your favorite show-"Music Land" ! This month we are going to have some special shows on Bach, the Father of Music.

Johann Sebastian Bach was born in Germany(德国)in 1685. During his life, Bach wrote a lot of music for the church (教堂) and for his students, but he himself did not keep his own works(作品) carefully. Luckily, his second wife(妻子)saved them for him, so today we can still remember Bach through his music.

Bach married twice in his life and had 20 children. He loved his family very much. He wrote music for one of his daughters to tell her that too much coffee was bad for her health. I am now going to play a song for you from this interesting Coffee Cantata. And we will hear more about Bach after this song.

小题1:Why is Bach’s second wife important to his music?

A.She helped Bach keep his works.

B.Many of Bach’s works were for her.

C.She gave Bach a lot of good ideas about music.

D.Her money helped Bach write music.小题2: Why did Bach write the Coffee Cantata?

A.To celebrate his birthday.

B.To show people his love of coffee.

C.To tell his child not to drink so much coffee.

D.To make a new kind of music for the church.小题3: What is this passage mainly(主要地)about?

A.Ways to learn Bach’s music.

B.The Bach family’s history.

C.Bach’s great church music.

D.Stories about Bach and his music.小题4: This passage may be a ______.

A.fashion show

B.radio show

C.TV play

D.talk show

题型:单项选择题
某物质中可能有甲酸、乙酸、甲醇和甲酸乙酯4中物质中的一种或几种,在鉴定时有下列现象:①可发生银镜反应;②加入新制悬浊液沉淀不溶解;③与含酚酞的NaOH共热发现溶液中红色逐渐消失直至无色。下列叙述中正确的是(  )
A.有甲酸和甲酸乙酯B.有乙酸和甲酸乙酯
C.可能有甲醇,一定有甲酸乙酯D.几种物质都有
题型:单项选择题

读中国西北地区某城市简图回答

四地中租金最高的是

A.甲

B.乙

C.丙

D.丁

题型:单项选择题

希尔排序法属于哪一种类型的排序法 ______。

A.交换类排序法

B.插入类排序法

C.选择类排序法

D.建堆排序法

题型:单项选择题
不定项选择
如图所示,一个铜质圆环,无初速度地自位置I下落到位置Ⅱ,若圆环下落时其轴线与磁铁悬线重合,圆环面始终水平。位置I与位置Ⅱ的高度差为h,则运动时间(   )

A.等于

B.大于

C.小于

D.无法判定

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