患者男性，45岁，间断上腹部不适3年，胃镜提示慢性萎缩性胃炎，Hp(+)。应该

（4分）电磁打点计时器工作电源是　　 （选填“直流”或“交流”）电源，电压为       V以下；电火花打点计时器是工作电压为          V，频率为50Hz时，每隔          s打一次点.

　　ARIEL, West Bank: A suicide bomber blew up near Israeli soldiers outside a Jewish settlement in the West Bank yesterday, killing at least three people and wounding about 30 others, the settlement's mayor and rescue workers said.

　　"A suicide bomber came and there were many soldiers...and he blew himself up." said Ron Nachman, mayor of the settlement of Ariel. "Soldiers were among the casualties. "People on the spot said the bomber blew up after soldiers eating at a food stand in a petrol station at the entrance of the settlement found him. According to some people on the spot accounts reported by Israeli media, a soldier shot and wounded the bomber, who then exploded.

　　The Magen David Adorn ambulance service said at least three people were killed and at least 30 wounded in the blast, which set the bomber burning at Ariel, about 25 kilometers east of Tel Avi v.

　　A fire brigade official said: "The bomber was still burning when we got there and we put out the fire immediatelly."

　　Meanwhile, a blast shook homes in Lebanon's largest Palestinian refugee camp early yesterday, damaging buildings but causing no injuries, Palestinian sources said. They said the bomb was planted outside the home of a member of Palestimian President Yasser Arafat's Fatah faction in Ain el-Hilwch camp, and exploded while the family was sleeping.

　　小题1:Some of people including ________were killed or wounded in the blast accident.

A．soldiers

B．mayor

C．rescue workers

D．a fire brigade official　　　小题2:The suicide bomber blew himself up because________.

A．there was something wrong with his brains

B．a soldier shot and wounded him

C．he couldn't see the settlement's mayor

D．he wanted to make himself known　　小题3:What does the underlined word "casuahies" probably mean in the second paragraph?________

A．sufferers

B．killers

C．passersby

D．losers　　小题4:It can be concluded that the passage is most probably part of a （n）________.

A．announcement

B．advertisement

C．news report

D．science research

关于CEA，不正确的是（）。

A.属肿瘤特异性抗原

B.正常人血清含量<5μg/L

C.含量>20μg/L，应考虑有癌症的可能

D.对消化道肿瘤的诊断特异性较高

E.是一种糖蛋白

下列（）不属于早强型水泥。

A.32.5 

B.42.5R 

C.52.5R 

D.62.5R

中 * * 党领导下的第一个农村革命根据地是（）。