寄生人体内最大的原虫是A．结肠小袋纤毛虫 B．溶组织内阿米巴 C． * * 毛滴虫 D．疟

某单位职工房统一装修。厨房、卫生间墙面采用彩色釉面陶瓷砖。墙砖粘贴半年后，经检查发现，约占总量30%的墙砖釉面开裂(胎体没有发现开裂)，表面裂纹方向无规律性。另外还进行了吊顶工程装修。

下列对釉面开裂原因分析错误的是( )。

A．釉面陶瓷砖的质量不好

B．釉面陶瓷砖吸水率大

C．釉面陶瓷砖松质松脆

D．以上答案均不是

缩余釉上皮

     It's important that you know some basic safety tips when you choose toys for your kids. Good toys

are a great investment, but they just need to be safe. Believe it or not, there are quite a few dangerous

toys on the market. So, here are some simple tips to keep in mind that will help you buy the safe ones.

     ●Tip 1 Consider the size of the toys.

     When you are considering toys for your kids, the first thing you need to do is to consider the size of

the toys. You don't want to purchase toys that come with small parts, such as wheels, eyes, or buttons.

If these parts come off, they can be swallowed. This is especially important if you happen to have kids

who are under the age of four.

     ●Tip 2

     The shape of the toys you choose should also be taken into consideration. Make sure that they don't

have any blunt (钝的) ends or edges that are very sharp. Metal toys and glass toys should be avoided.

     ●Tip 3 Find out about surface safety.

     Find out about the safety of the surface before you purchase any toys. Try to find a label that will let

you know if there are any toxic substances (有毒物质) that you need to know about. Some toys lately

have been painted with paint that was toxic, and other toys often contain liquids in them that are toxic to

kids if they happen to leak out.

     ●Tip 4 Beware of strings.

     Beware of strings when you are buying toys. Strings can be very dangerous to your children,

especially if you have younger children. They can get wrapped up around your children's body, and this

is very dangerous, especially if the string gets wrapped around their neck. So, it's best to avoid toys             .

1. What does the text mainly talk about? (Please answer within 8 words.)

2. Give a title to the third paragraph. (Please answer within 5 words.) 

3. Fill in the blank in the last paragraph with proper words. (Please answer with 5 words.)

4. Which sentence in the text is the closest in meaning to the following one?

By no means should you buy metal toys and glass toys.

5. Translate the underlined sentence in the first paragraph into Chinese.

WinBench属于下列哪种管理软件（）。

A.磁盘分区管理工具

B.多系统管理软件

C.系统测试软件

D.文件恢复工具

我国已先后有31处被评选列入《世界遗产名录》，北京是世界上文化遗产最多的城市，其中北京有6处。（）