C4植物的CO2补偿点低于C3植物。
参考答案:对
Listening to music is a good way to help us get some _______ from work pressure. [ ]
A. safety
B. relief
C. pleasure
D. comfort
易出血()
A.缺乏VitK
B.缺乏VitE
C.缺乏VitD
D.缺乏VitC
E.缺乏VitA