如图表示某种植物的非绿色器官在不同氧浓度下CO2释放量和O2吸收量的变化,请据图回答:
图中阴影部分的面积代表()
参考答案:
无氧呼吸释放的CO2量
Lots of people in our city _____ the old and the disabled. They usually offer their seats to them on buses or help them cross the road.
A. care for .
B. take care
C. agree with
D. take pride in
mystrlen函数的功能是计算str所指字符串的长度,并作为函数值返回。请填空。 int mystrlen(char * str) int i; for (i=0; 【7】 )!=’\0’;i+ +) return 【8】);