传染性非典型肺炎的病原学特点()
A.细菌感染
B.衣原体感染
C.支原体感染
D.冠状病毒
E.真菌
参考答案:D
—Your spoken English is really good.
— ______.[ ]
A. That's all right
B. Thank you very much
C. It doesn't matter
D. That's a good idea
某天体上中天时,其地方时角等于(),半圆方位等于(),位置角等于()。
A.180°;0°;180°
B.0°;180°;180°
C.0°;0°;0°
D.0°;0°;180°