总量指标的计量单位有（） A.实物单位 B.货币单位 C.劳动量单位 D.纯数学单位

In nature, you may see many insects (昆虫）and animals of different colors. Have you ever wondered why?

Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them.It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young,locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.

Brown bears,tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤） in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over , its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

小题1:It is not easy for birds to catch locusts because____________.

A．locusts are good runners

B．locusts can jump very high

C．locusts are smarter than birds

D．locusts can change their color小题2:According to the passage, most soil insects_________

A．do not have bright colors

B．change their colors with the soil

C．do not live in a dark and wet environment

D．Eat colorful insects like butterflies and bees小题3:What’s the meaning of the underlined word”survive” in the passage?

A．繁殖

B．产卵

C．觅食

D．生存小题4:The ink fish_______so that its enemies will not see it?

A．changes its color

B．makes the water around it black

C．appears only at night

D．hides itself in the sea rocks小题5:What is the main idea of this passage?

A．Some insects and animals have different skills.

B．Some insects and animals are clever than we think.

C．Some insects and animals use colors to protect themselves.

D．Some insects and animals can get used to the environment easily.

下列关于冲天炉的叙述中，正确的是（）。

A.冲天炉的内径越大，生产率越低

B.燃料消耗相同时，铁水出炉温度越高，炉子经济效果越好

C.相同熔化率下，冲天炉内熔化带处断面积越大，融化强度越大

D.铁焦比越大，焦炭消耗率越大

癌前病变（）

A．乳腺导管内癌

B．结肠腺瘤性息肉病

C．胃中分化腺癌侵及黏膜下层

D．卵巢交界性黏液性囊腺瘤

E．子宫颈重度非典型增生

今天，随着中国海洋事业的发展和对外开放的扩大，马六甲海峡之于中国的重要性日益显现出来从航运上来说，马六甲海峡距中国领海很近，是中国通往印度洋的重要通道一旦马六甲海峡被本地区以外的别有用心的势力控制，势必会影响中国的航运安全，尤其在国际局势存在变数的情况下，这条航道随时可能因战事而被阻断，因此，设法参与，维护马六甲海峡的安全，确保海峡的航运畅通，是中国必须面对的重要课题。 这段文字旨在说明马六甲海峡( )

A．之于中国的重要性

B．局势不稳易中断

C．必须有中国参与，维护其安全

D．关系中国航运安全

在AUTOCAD2006中，能否对填充的图案进行裁减（）。

A.不可以，图案是一个整体

B.可以，将其分解后

C.可以，直接裁剪

D.不可以，图案是不可以编辑的