老年人代谢组织的总量逐年下降,基础代谢下降大约为()
A.10%~15%
B.15%~20%
C.20%~25%
D.25%~30%
E.30%~35%
参考答案:B
The computer software is old, _____ very out of date. [ ]
A. or rather
B. rather than
C. other than
D. more than
在分光光度分析中选择的最常用参比溶液有是()。
A.溶剂参比
B.样品参比
C.褪色参比
D.试剂参比