关于难免流产,下列描述正确的是
A.宫颈口关闭
B.子宫大于停经周数
C.阴道流血量较多,腹痛加重
D.经休息和治疗后流产可以避免
正确答案是C
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Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
However hard they tried, they couldn’t overcome the ( )differences between them. (deep, root)