按照《固定资产贷款管理暂行办法》的要求，贷款人放款前，贷款人只需与借款人签订书面借款合同、担保合同等相关合同。（）
参考答案：错
—Excuse me. When does Flight CZ3391 take off?
—One moment, please. I'll _____ it _____. [ ]
A. look; up
B. take; away
C. give; back
D. turn; down
试述缺铁性贫血的病因和治疗Please describe the etiology and treatment of iron deficiency anemia（15分）.
