（）是为了预防建筑物各部分由于不均匀沉降引起的破坏而设置的。
A、伸缩缝
B、分仓缝
C、沉降缝
D、防震缝
参考答案：C
I ________my homework while my parents _________TV last night.
A．did; have watched
B．was doing; were watching
C．had done; were watching
D．would do ;were watching
患儿，女，1岁5个月，因青紫1年诊断为法洛四联症，今患儿哭闹后突然出现昏厥、青紫加重，考虑为( )。
A．心律失常 B．心力衰竭 C．脑血栓D．缺氧发作 E．脑膜炎
