上颌
牙冠与基托塑料连接不牢，可能的原因为（）
A.牙冠填塞与基托填塞相隔时间过长
B.暴露在空气中单体挥发，关盒前牙冠与基托间未加单体溶胀
C.塑料充填不紧，试压后玻璃纸未去除干净
D.分离剂涂布过多
E.以上均是
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| What is a museum? A museum is a good place to keep 1 and beautiful things. A museum may be a place to learn about science. A museum can be a place 2 art of humans or animals. What is inside a museum? Some museums 3 old cars and airplanes. 4 museums have pictures and sculptures. Others have rocks and old bones. One museum even has 5 coal mine inside! Many cities have museums. Some very small 6 have museums, 7 . Indianapolis has a 8 museum. Children do not have to 9 to get in. Children often go to the museum. They like to see at the dinosaur bones. They see a white bear ten feel tall. They go inside an old log cabin(小木屋). On Saturday, Indianapolis children can 10 talks about animals and trees. | |||
| ( )1. A. new ( )2. A. for ( )3. A. has ( )4. A. Bit ( )5. A. the ( )6. A. homes ( )7. A. too ( )8. A. adults ( )9. A. pay ( )10. A. sing | B. old B. in B. have B. A little B. an B. towns B. also B. people’s B. speak B. see | C. good C. about C. there is C. Much C. a C. villages C. either C. children’s C. run C. hear | D. important D. on D. there are D. Many D. / D. countries D. neither D. boy’s D. cry D. feel |
阀门型号通常表示有7个单元，如Z543H-16C其中Z表示（）
A、止回阀
B、蝶阀
C、闸阀
D、球阀
平第二骶后孔，督脉旁开1.5寸的腧穴是（）。
A.小肠俞
B.膀胱俞
C.中膂俞
D.胞肓
E.秩边
下列各项中，（）不属于玻璃幕墙的组成部分。
A．玻璃
B．附件
C．墙体
D．骨架
慢性唇炎的病因是
A．舔唇不良习惯
B．病灶感染
C．感冒
D．消化不良
E．寄生虫感染