职位分析收集的与潜在任职者相关的信息不包括( )。A．受教育程度 B．专业知识水平

患者男性，70岁。排尿困难10年，近一年加重，伴尿频、尿急和尿痛。查体：前列腺Ⅲ度增大，质中，光滑。B超前列腺5.2cm×4.6cm×3.8cm，膀胱内多个强光团回声伴声影直径0.5～1.0cm。膀胱X线检查未见结石影

该患者膀胱结石的成分最可能的是（）

A.草酸钙结石

B.磷酸钙结石

C.尿酸结石

D.胱氨酸结石

E.磷酸镁胺结石

F.碳酸钙结石

青春期男性性发育的第一信号是（）。

A.体格发育

B.胡须开始生长

C.首次遗精

D.睾丸增大

E.体重增加

两个底面积相同的容器甲和乙放在水平桌面上，甲注满酒精，乙中注满水．酒精对甲容器底部的压力为F₁，水对乙容器底部的压力为F₂，则（　　）

A．F₁＞F₂

B．F₁=F₂

C．F₁＜F₂

D．无法判断

An allergy is a strong reaction to a substance. Many things can cause allergies. The most common cause is pollen (花粉), which is usually produced by trees in the spring, grasses in the summer and weeds in the fall, as part of their reproductive process.

Other causes include organisms, chemicals, plants and dead skin particles from dogs and cats can also cause allergic reactions. So can insect stings and some food.

The most common kind of allergic reactions is itchy (痒的) , watery eyes and a blocked or watery nose. Allergies can also cause red, itchy skin. Some reactions can be life-threatening, for example, when breathing passages become blocked.

It is not always easy to avoid allergies. Drugs may offer an effective treatment. Another treatment used in some cases is called immunotherapy. A patient is injected with small amounts of the allergy-causing substance. The idea is that larger and larger amounts are given over time until the patient develops resistance in his body.

In the United States, experts estimate that up to 8% of young children have food allergies. Every year these allergies cause about 30,000 cases with severe reactions that require immediate treatment. It can result in breathing trouble and in some cases death. It is said that about 100 to 200 people will die. It is said that most of the reactions are caused by peanuts and tree nuts like walnuts.

People can also be allergic to medicines. The American Academy of Allergy, Asthma and Immunology says about 10％ of bad reactions to commonly used medicines are allergic. In other words, a person’s immune system overreacts and produces an allergic reaction. The most common reactions include skin rashes, itching, breathing problems and swelling in areas such as the face.

小题1:Allergies seldom occur in winter because ________.

A．plants don’t usually flower in cold weather

B．people usually wear thick clothes

C．pollen is active below freezing point

D．the weather is too cold for viruses小题2:What will happen if one’s breathing passages get blocked?

A．It is nothing serious.

B．One’s life is at risk.

C．One has to be sent to hospital.

D．One is sure to breathe easily.小题3:According to immunotherapy, the patient is supposed to________.

A．take some medicines to produce antibodies

B．have immediate operations

C．be given the allergy-causing substance until the patient develops resistance

D．be exposed to enough allergy-causing substances小题4:The best title would be _______.

A．The ABCs of Allergies

B．The Cause of Allergies

C．The Treatment of Allergies

D．The Prevention of Allergies

冲压对金属材料表面状态质量要求（）

A.材料的表面必需是光洁平整、无杂质、无气孔、无裂痕

B.材料的断面没有分层现象，并且没有明显的机械性能损伤

C.材料表面硬度要高

D.材料表面无锈斑，无氧化皮等其他附着物

E.材料的强度要高