如术中发现胰头部一轮廓不规则肿物，边界尚清，与周围组织无粘连，未触及肿大淋巴结，宜采

贾水旺是三合村的富户，一儿二女都已成家。儿子贾责成家后，经常为开销问题与父亲拌嘴，于是，贾水旺夫妇与儿子分家单独生活。2007年6月，贾水旺夫妇到湖南走亲戚，在途中不幸身亡，留下房屋一栋，存款3万元。姐妹俩要求与贾贵平分遗产。贾贵却说，姐姐与妹妹出了这个家的门，就不是这个家的人，自己才是贾家的传宗接代者，这笔遗产理应由自己单独继承。

你认为贾贵的说法对吗？为什么？

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原核微生物的核糖体大小为（）S。

阅读理解。

    The biggest safety threat facing airlines today may not be a terrorist (恐布分子) with

a gun, but the man with the portable computer in business class. In the last 15 years,

pilots have reported well over 100 incidents that could have been caused by electromagnetic

(电磁) interference (干扰). The source of this interference remains unconfirmed, but

increasingly, experts are pointing the blame at portable electronic device such as portable

computers, radio and cassette players and mobile telephones.

    RTCA, an organization which advises the aviation (航空) industry, has recommended that

all airlines ban (禁止) such devices from being used during "critical" stages of flight,

particularly take-off and landing. Some experts have gone further, calling for a total ban

during all flights. Currently, rules on using these devices are left up to individual

airlines. And although some airlines prohibit (禁止) passengers from using such equipment

during take-off and landing, most are reluctant to enforce a total ban, given that many

passengers want to work during flights.

    The difficulty is prediction how electromagnetic fields might affect an aircraft's

computers. Experts know that portable device emit radiation which affects those wavelengths

which aircraft use for navigation and communication. But, because they have not been able

to reproduce these effects in a laboratory, they have no way of knowing whether the

interference might be dangerous or not.

    The fact that aircraft may be vulnerable (易受损的) to interference raises the risk

that terrorists may use radio systems in order to damage navigation equipment. As worrying,

though, is the passenger who can't hear the instructions to turn off his radio because the

music is too loud.

1. The passage is mainly about _____. [ ]

A. effective safety measure of aircraft crashes

B. a possible cause for air flight accidents

C. the defects (缺点) of electronic devices

D. a new regulation for all airlines

2. What is said about the over 100 aircraft incidents in the past 15 years? [ ]

A. They may have taken place during take-off and landing.

B. They may have been caused by the damage to the radio systems.

C. They were suspected to have resulted from electromagnetic interference.

D. They were proved to have been caused by the passengers' portable computers.

3. Few airlines want to impose (强加) a total ban on their passengers using electronic

   devices because _____. [ ]

A. they have other effective safety measures to fall back on

B. they don't believe there is such a danger as radio interference

C. the harmful effect of electromagnetic interference is yet to be proved

D. most passengers refuse to take a plane which bans the use of radio and cassette players

4. Why is it difficult to predict the possible effects of electromagnetic fields on an

   airplane's computers? [ ]

A. Because experts lack adequate equipment to d such research.

B. Because it is extremely dangerous to conduct such research on an airplane.

C. Because it remains a mystery what wavelengths are liable to e interfered with.

D. Because research scientists have not been able to produce the same effects in labs.

5. It can be inferred from the passage that the author _____. [ ]

A. hasn't formed his own pinion on this problem

B. has overestimated the danger of electromagnetic interference

C. thinks it is unreasonable to exercise a total ban during flight

D. is in favor of prohibiting passengers' use of electronic devices completely

观察锅炉燃烧情况时，须戴（）或用有色玻璃遮着眼睛。在锅炉升火期间或燃烧不稳时，不可站在堪火门、检查门或喷燃器检查孔的正对面。

A.安全帽；

B.工作帽；

C.防护眼镜。