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问题 单项选择题

关节附近骨折，骨膜剥离形成较大骨膜下血肿、机化、钙化后可致

A．创伤性关节炎
B．缺血性骨坏死
C．缺血性肌挛缩
D．脂肪栓塞
E．骨化性肌炎

答案

参考答案：E

填空题
从方框中选择恰当的单词填空，使短文意思完整。
where,  some,  chair,  set,  and,  on,  plants,  alarm clock,  they,  what
     This is the bedroom (卧室) of Alan. It is clean (干净的). There are (有) 1_____ pictures on the wall (墙).
There is a 2_____  of keys and an 3_____  on the desk. His backpack is on the 4_____ . His jacket is 5_____ 
the bed. 6_____ are his video tapes? 7_____  are in the drawer. 8_____  are those on the sill (窗台)? Oh,
those are 9_____  and flowers (花). 10_____  where's his math book? It's in the bookcase.
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填空题

如图所示，在置于匀强磁场的平行导轨上，横跨在两导轨间的导体杆PQ以速度υ向右匀速运动．已知磁场的磁感应强度为B、方向垂直于导轨平面(即纸面)向外，导轨间距为L，导体杆PQ的电阻为r．导轨左端连接一电阻R，导轨的电阻忽略不计，则通过电阻R的电流方向为______________，导体杆PQ两端的电压U=_____________．
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