下列哪项是导致孕产妇发生右心衰竭的疾病
A．子痫B．妊娠合并二尖瓣狭窄C．羊水栓塞D．产褥感染E．败血症
参考答案：C
The stone on the river bank rolled under her feet； she was _____into the river，and she called out for help.
A．being jumped
B．jumped
C．pulled
D．being pulled
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