— you come on, you will do it better.
A:As long as
B:As soon as
C:Though
D:While
1)到社区或福利院去做志愿服务;
2)学习有关机器人的知识;
3)和家人或朋友去旅游。
提示词:福利院Welfare House
注意:1)词数100左右;
2)可以适当增加细节,以使行文连贯。
Dear Sam,
Yours,
Li Hua
如图所示的培养基上有两处菌斑,A处较小且表面光滑黏稠;B处为黑色,呈绒毛状,以下判断错误的是( )
— There's somebody at the door. Who ____ it be? Is it the postman?—No. It ______ be him. It's just seven o'clock. It's too early.
激素作为一种化学信使,能把某种调节的信息由内分泌细胞携带至靶细胞。下图表示影响血糖调节的因素及激素发挥作用的过程,有关叙述正确的是( )