32人是50人的______%;45分占1小时的______%.

题型:填空题

问题:

32人是50人的______%;45分占1小时的______%.

考点:百分数的计算,百分数的应用题
题型:填空题

对以下特殊病原菌的消毒措施正确的是()

A.离体后的HIV几乎所有的消毒剂在短时间内均可将其灭活

B.向生殖器官喷涂消毒剂,可以有效预防在性生活中感染淋病和梅毒

C.低效消毒剂即可杀灭梅毒病原体

D.炭疽杆菌可以使用中效消毒剂

E.结核杆菌只能使用高、中效消毒剂

题型:填空题

The practice of magic includes special words, actions, and objects. Most magic involves a person called a magician, who claims to have supernatural powers. Magic words.

To work most magic, the magician sings or speaks special words in a certain order. These words are called incantations or spells. Some spells form prayers to demons(魔鬼), spirits, or other supernatural forces. Many societies believe the magic will not work unless the magician recites the spells perfectly. Other magic words have no meaning, though they supposedly possess power when spoken by a magician. Magic actions accompany the words spoken in performing much magic. Many of these movements act out the desired effect of the magic. For example, a magician trying to make rain fall may sprinkle(洒) water on the ground. The magician's combined words and actions form a ceremony. Magic objects include certain plants, stones, and other things with supposed supernatural powers. Any such object may be called a fetish(物神). But this term often refers to an object—for example, a carving or a dried snake—honored by a tribe for its magic powers. Many tribes believe fetishes have magic power because spirits live in these objects. Many people carry magic objects called amulets(护身符)to protect themselves from harm. Many amulets are stones or rings engraved(雕刻) with magic symbols.

The magician, in some societies, nearly everyone knows how to work some magic. In other societies, only experts practice magic. Magicians may be called medicine men, medicine women, shamans, sorcerers, or witch doctors. In many societies, magicians must inherit(遗传) their powers. In others, any person may become a magician by studying the magical arts.

Many societies believe magicians must observe certain rules and taboos (forbidden actions) for their spells to work. For example, they may be required not to eat various foods or to avoid sexual activity for a certain period before the ceremony.

小题1:What do magic words mean to people in some society?

A.They have the power to kill devils.

B.They have power if magician recites the right spells.

C.They have no effect at all.

D.They can be used whenever they want.小题2:Why do many people believe in a fetish?

A.Because it is often a ring which is worth a lot of money.

B.Because it is carved with magic symbols.

C.Because people think spirits live in it.

D.Because it can help them with many things.小题3:What's the best title of the passage?

A.How Magicians make Magic Work

B.The Power of Magic

C.How to Practice Magic

D.The Choice of Magicians

题型:填空题

在影响机械效率的许多因素中,摩擦是一个重要因素。小丽将“探究摩擦力大小与什么因素有关”的实验与“探究斜面的机械效率”的实验相结合,进一步探究斜面机械效率与斜面粗糙程度的关系。实验装置如图所示。

(1)请将下列实验步骤中的空白补充完整。

实验步骤:

①用弹簧测力计测出木块的________。  

②用弹簧测力计匀速拉动木块沿斜面向上运动,读出弹簧测力计示数。    

③用刻度尺分别测出木块沿斜面移动的距离s及上升的高度h。    

④记录实验数据并填入表中。

⑤保持斜面的________一定,将棉布铺在木板上,重复上述步骤。

(2)该实验中采用了________的研究方法。

(3)计算斜面表面为棉布时的机械效率:________%。

(4)分析实验数据可以得出实验结论:_________________________________________。

题型:填空题

采购审计的主要目的是()

A.确认合同项下收取的成本有效、正确

B.简要地审核项目

C.确定可供其他采购任务借鉴的成功之处

D.确认基本竣工

题型:填空题

下列是当代报告文学中第一部反映矿产开发、管理、揭露矿难问题的作品是()

A.《守望天山》

B.《国家行动》

C.《落泪是金》

D.《共和国告急》

更多题库