单项选择题
The balloon contained two MPs. ________ two MPs in it. A、They were B、There were C、The had D、There had
单项选择题 下列疾病通过骨髓涂片检查可确诊的是 A．缺铁性贫血 B．ITP C．巨幼细胞性贫血 D．脾功能亢进 E．MDS
多项选择题 信念具有以下特征( ) A、执着性 B、多元性 C、多样性 D、唯一性
