1mmHg等于（）Pa。 A.9.81 B.133.30 C.27.20 D.13.

白细胞中具有免疫功能的细胞主要是

A．单核细胞

B．中性粒细胞

C．淋巴细胞

D．嗜酸性粒细胞

E．嗜碱性粒细胞

下列有机物中，与CH₃CH₂CH₂CH₃互为同分异构体的是（　　）

A．CH₄

B．CH₂=CH₂

C．CH（CH₃）₃

D．CH₂=CHCH₂CH₃

     Camping wild is a wonderful way to experience the natural world and, at its best, it makes little

environmental influence. But with increasing numbers of people wanting to escape into the wilderness, it

is becoming more and more important to camp unobtrusively(不引人注目地)and leave no mark.

     Wild camping is not permitted in many places, particularly in crowded lowland Britain. Wherever you

are, find out about organizations responsible for managing wild spaces, and get in touch with them to find

out their policy on camping and shelter building. For example, it is fine to camp wild in remote (偏远的)

parts of Scotland, but in England you must ask the landowner's permission, except in national parks.

     Camping is about having relaxation, sleeping outdoors, experiencing bad weather, and going without

modern conveniences. A busy, fully-equipped campsite (野营地) seems to go against this, so seek out

smaller, more remote places with easy access to open spaces and perhaps beaches. Better still, find a

campsite with no road access: walking in makes a real adventure.

     Finding the right spot to camp is the first step to guaranteeing a good night's sleep. Choose a campsite with privacy and minimum influence on others and the environment. Try to use an area where people have obviously camped before rather than creating a new spot. When camping in woodland, avoid standing by dead trees, which may fall on a windy night. Avoid animal runs and caves, and possible homes of biting

insects. Make sure you have most protection on the windward side. If you make a fire, do so downwind

of your shelter. Always consider what influence you might have on the natural world. Avoid damaging

plants. A good campsite is found, not made-changing it should be unnecessary.

1. You needn't ask for permission when camping in __________.

A. national parks in England

B. most parts of Scotland

C. crowded lowland Britain

D. most parts of England

2. The author thinks that a good campsite is one __________.

A. with easy access      

B. used previously

C. with modern conveniences    

D. far away from beaches

3. The last paragraph mainly deals with __________.

A. protecting animals      

B. building a campfire

C. camping in woodland    

D. finding a campsite with privacy

4. The passage is mainly about __________.

A. the protection of campsites    

B. the importance of wild camping

C. the human influence on campsites

D. the dos and don'ts of wild camping

《特种设备安全监察条例》规定，发生较大事故，对事故发生负有责任的单位的主要负责人未依法履行职责，导致事故发生的，由特种设备安全监督管理部门处（）罚款。

A、上一年年收入40%的

B、上一年年收入60%的

C、上一年年收入20%的

D、上一年年收入30%的

日本军事战略