小儿营养不良的血清血检查的特征性改变是（） A.血清酶活性降低 B.血清胆固醇升

泥泞道路对安全行车的主要影响是什么？

A、行驶阻力变小
B、车轮极易滑转和侧滑
C、能见度低，视野模糊
D、路面附着力增大

《MA、RPOL73/78防污公约》的哪个附则是通过《国际危规》实施的？（）

A、附则Ⅰ

B、附则Ⅱ

C、附则Ⅲ

D、附则Ⅳ

凭自己的理解简述图层的作用？

Word came that the government must control the spread of this disease.

“Our job，”said the　26　officer，“is to spray the wall of every house in every town and village in the malariaparts of Mexico.You may be　27　to learn that there are about ninety-nine thousand　28　villages and towns.Some are big places like the capital city，　29　are single houses deep in the forest or upon the mountaintops.The men working with our program say that most of these people　30　within districts which are　31　enough for the mala ria-carrying mosquitoesto live in and spread the disease.That　32　that we must plan to spray the bricks of　33　three million houses once or twice a year for five years.”

“We have　34　everything very carefully，”said the officer　35　.“Our advance guards have drawn　36　of some forty thousand parts of the country for　37　by the spray teams.Each house in the malaria districts has been given a special　38　so that we can work in order.The United States has given us cars and trucks to carry the spray teams and their　39　.”

“The malaria program has been　40　with the people in this country.Everyone wants to　41　.The Defense Department is helping us plan the　42　of men and supplies.The Education Department has printed sheets in Spanish to explain　43　malaria is spread.Resistance is a problem.It was in the neighboring country—the United States that such resistance to spray was first　44　.Take the　45　of the housefly and D.D.T. At fist D.D.T. killed them off.Now it won’t hurt a fly.”

“What worries people is the danger that the mosquitoes may become resistant，”said the officer at last.

26.A.education              B.wealth                       C.health                       D.medicine

27.A.surprised                     B.excited                      C.doubtful                    D.happy

28.A.united                  B.developing                C.similar                      D.separate

29.A.other                    B.some                         C.the others                  D.the few

30.A.sleep                    B.live                           C.stand                         D.sit

31.A.cold                            B.hot                           C.bright                       D.warm

32.A.saves                    B.expresses                   C.means                       D.is

33.A.nearly                  B.mostly                      C.finally                       D.only

34.A.read                            B.learnt                        C.written                      D.studied

35.A.mentioned            B.remembered                     C.started                       D.continued

36.A.pictures                B.places                       C.maps                         D.bus-lines

37.A.store                    B.use                           C.share                         D.show

38.A.name                    B.sign                          C.number                            D.attention

39.A.tools                   B.clothes                      C.families                     D.guns

40.A.familiar                B.friendly                     C.strict                         D.popular

41.A.work                    B.run                           C.stop                          D.help

42.A.movement            B.program                    C.action                       D.equipment

43.A.why                            B.how                          C.what                         D.that

44.A.proved                 B.killed                        C.thought                            D.discussed

45.A.event                    B.matter                       C.fact                           D.case

女性患者，32岁，缺失，单端固定桥（无），戴2年余，近期自觉基牙松动，冷热疼痛不适，查：松动Ⅰ度，固位体面穿孔，深龋洞，边缘不密合，牙龈充血，红肿

牙龈发炎的原因是（）。

A.基牙受力过大

B.牙冠过大

C.固体位面形态欠佳

D.固位体边缘与基牙不密合

E.以上都对