下列是Arrhenius公式的是哪项().
A.A
B.B
C.C
D.D
E.E
参考答案：A
The glass doors have taken the place of the wooden ones at the entrance, ___ in the natural light during
the day. [ ]
A. to let
B. letting
C. let
D. having let
婴幼儿心衰的临床指征是什么？
