根据哈罗德模型,储蓄率提高,则合意经济增长率()
A、提高;
B、下降;
C、不变;
D、不确定。
参考答案:A
—My sister finished school three years ago.
—What__________these years?
A.did she do
B.has she been doing
C.is she doing
D.does she do
传染性非典型肺炎患者胸片检查可见()
A.不同程度的片状、斑片状浸润性阴影
B.呈网状改变
C.大片状阴影
D.常为多叶或双侧改变
E.阴影消散吸收较快,肺部阴影与症状体征相符