流行性出血热早期出现休克是因为
A．继发严重感染
B．心肌损害
C．腔道大出血
D．弥散性血管内凝血
E．小血管通透性增加，大量血浆外渗
参考答案：E
若（x-1）2=4，则x=______．
—Did you stay up late last night?
—Not very late. It was half past eleven I went to bed.
A．that
B．when
C．before
D．since
