[不定项选择题]某病人上颌第二磨牙有龋洞，洞内呈黑褐色，探诊质软，对冷热酸甜刺激敏感 若要恢复其牙齿外形和生理功能，治疗方法应为
A.银汞合金充填
B.刷牙
C.氟化物治疗
D.口服螺旋霉素
E.以上都不是

[不定项选择题]某病人上颌第二磨牙有龋洞，洞内呈黑褐色，探诊质软，对冷热酸甜刺激敏感 若病人为根面中龋，效果最好的治疗为
A.银汞合金充填
B.氟化物
C.玻璃离子水门汀
D.复合树脂充填
E.以上都不是

[不定项选择题]某病人上颌第二磨牙有龋洞，洞内呈黑褐色，探诊质软，对冷热酸甜刺激敏感 若病人常有"咬合痛"但无自发疼痛，此时应诊断为
A.静止龋
B.隐匿性龋
C.中龋
D.浅龋
E.深龋

[不定项选择题]某病人上颌第二磨牙有龋洞，洞内呈黑褐色，探诊质软，对冷热酸甜刺激敏感 此时最常用的修复方法为
A.窝沟封闭法
B.充填法和嵌体
C.局涂复化凝胶
D.用矿化液治疗
E.以上都不对

[不定项选择题]某病人上颌第二磨牙有龋洞，洞内呈黑褐色，探诊质软，对冷热酸甜刺激敏感 若检查洞底，位于牙本质浅层牙髓活力良好，可诊断为
A.深龋
B.浅龋
C.中龋
D.隐匿性龋
E.静止龋

[不定项选择题]某病人就诊时发现上颌第一磨牙邻面釉质龋，其邻牙缺失，病变处变硬，恢复光泽，但有色素沉着 其合适的治疗是
A.药物治疗
B.洁齿
C.根管充填
D.拔牙
E.以上都不对

[不定项选择题]共用题干 第二篇

Are These Food Safe to Eat?

Traditionally,in plant breeding,there are crossing varieties of the same species in ways they could cross naturally.For example,disease-resistant varieties of wheat have been crossed with highyield wheat to combine these properties.This type of natural gene exchange is safe and fairly predictable.
Genetic engineering(G E)makes it possible to exchange genes between unrelated species that cannot exchange genes with each other in a natural way.GE can involve the exchange of genes be-tween vastly different species一e.g. putting scorpion toxin genes into maize or fish antifreeze genes into tomatoes.It is possible that a scorpion toxin gene,even when it is in maize DNA,will still get the organism to produce scorpion toxin一but what other effects may it have in this alien environment? We have already realized this problem一adding human growth hormone genes to pigs certainly makes them grow一but it also gives them arthritis and makes them cross-eyed,which was entirely out of expectation.
It won't be difficult to find out,for example,that the gene for human intelligence will not have the same effect if it is inserted into cabbage DNA as it had in human DNA一but what side-effect would it have?In other words,is genetically modified(GM)food safe to eat?The answer is that no-body knows because long-term tests have not been carried out.
Those companies who want a GM product approved in the UK or USA are required to provide regulatory bodies with results of their own safety tests.Monsanto's soya beans were apparently fed to fish for 10 weeks before being approved.There was no requirement for independent testing,for longterm testing,for testing on humans or testing for specific dangers to children or allergic people.
The present opinion of the British Government is that"There is no evidence of long-term dangers from GM foods."In the US,the American Food and Drug Administration is now being prosecuted for covering up research that suggested possible risks from GM foods. Which statement is true based on the passages? A:If a company can provide regulatory bodies with results of their own safety tests,it can get GM product approvals from the UK or US
A.
B.The present opinion of the British Government is right.
C.Monsanto's soya beans were apparently fed to fish for 10 weeks after being approved.
D.Adding human growth hormone genes to pigs certainly makes them allergic.