动物体温升高后，其昼夜温差变动在VC以内，这种热型称为（）
A.稽留热
B.弛张热
C.间歇热
D.回归热
E.波状热
参考答案：A
当你站在一面竖直放置的平面镜前2m处，你的像到镜面的距离为______m；当你逐渐远离平面镜时，你在镜中的像的高度将______（选填：“变小”、“不变”或“变大”）．
---Can you let me know yesterday?
---Because the traffic was bad.
A．why did you come late
B．why you came late
C．why do you come late
D．why you come late
