MRI对以下哪种疾病的诊断价值较低（）
A.脊髓空洞症
B.白血病早期骨改变
C.髓内肿瘤
D.儿童生长骺板骨折
E.慢性化脓性骨髓炎
参考答案：E
Thanks a lot for agreeing _____ us _____ on the trip.[ ]
A. let, go
B. to let, go
C. to let, to go
D. letting, going
儿童缺铁会得佝偻病，缺钙会患贫血病．______．
