氟化物的防龋机制不包括A.抑制细菌酶 B.杀灭致龋菌 C.降低釉质溶解性 D.促进再

题型:单项选择题

问题:

氟化物的防龋机制不包括

A.抑制细菌酶

B.杀灭致龋菌

C.降低釉质溶解性

D.促进再矿化

E.影响牙外形

考点:口腔执业医师口腔执业医师48
题型:单项选择题

阅读理解。

     Stephen Hawking was bom in 1942. He's a world farnous acientist and exper on space and tine.Stephen in

trying to find the snswers to some very big questions.such as:How did the uni-verse begin?How will it end?

     Stephen was a strdent at Oniversity. He studied math and science.Then, at the age of twenty. he became

very ill. He was so young, but the doctors said to his family,"He has only two more years to live,"The doctors

were wrong-he didn't die "He can't walk now but he usea a wbeclchair (轮椅). He talks with the help of a

computer.After Oxrord,Stephen went to Canadridge Univeraity.Three years later, in 1965, he became a doctor (博士) of philosophy (哲学).

     Because of his health problems, it was difficuk for him to draw diagrams or to write.So he star-ted to think

in pictures.With this new way of thinking,he became one of the most famous scientists in the world, In1981,

he met the Pope (教室) in Rome.They talked about his ideas. Then in 1988, he wrote his first important book,

A Brief Histary of Time.It aold more than 5.5million cop-ies (册) in 333 difcrent Langusgees.

1.What did Stephen Hawking study at Oxlord University?

_______________________________________________________________________________

2.What did he decome very ill?

______________________________________________________________________________

3. What did the doctors dhink of his disease?

______________________________________________________________________________

4. What kind of person do you think Stephen Hawking is?

______________________________________________________________________________

题型:单项选择题

哪项是维生素D缺乏性手足抽搐症的表现()

A.手足徐动

B.昏迷

C.肌阵挛

D.惊厥

E.前囟张力增高

题型:单项选择题

“魅”的笔画是()。

A.13笔

B.14笔

C.15笔

D.16笔

题型:单项选择题

采掘运输等设备其主开关送电、停电或启动设备时应()。

A、呼唤

B、呼唤应答

C、断电

题型:单项选择题

有人低压触电时怎么办?()

A.先使触电者脱离电源,再对伤者进行急救

B.不管他,只大声呼救

C.伸手救援

D.用铁棒挑开电源

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