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【多选题】
Select the three ways by which biodiversity loss can erode ecosystem resilience:(Please select three answers)
A.
Decreases the amount of available freshwater
B.
Reduces the diversity of genetic material
C.
Increases the risk of wild fires
D.
Reduces the number of species that perform the same functions (functional redundancy
E.
Increases in the number of pollinators in ecosystems
F.
Increases the vulnerability of ecosystems
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】子宫MR检查注意事项,包括:()
A.
要求将尿液完全排空,消除膀胱蠕动伪影
B.
需要使用呼吸门控技术
C.
要求适当憋尿,有利于腹壁肌肉和子宫肌层分开
D.
冠状位是主要扫描方位
E.
不需要脂肪抑制序列
【单选题】The ancestors of the Dai people belong to ( ) people
A.
Baipu
B.
Diqiang
C.
Han
D.
Baiyue
【多选题】下列有关脊柱及脊髓MR扫描注意事项的叙述,正确的是()
A.
脊柱畸形加扫冠状位T2WI成像
B.
T1WI有高信号病灶时,应加扫T1WI脂肪抑制序列
C.
观察骨折或肿瘤以及T2WI图像有高信号灶时,加扫T2WI脂肪抑制序列或STIR序列
D.
如需行脊柱MRI增强扫描,应使用脂肪抑制的T1WI序列