如图所示的情景中，物体所受重力的示意图正确的是（ ）
A：
B：
C：
D：
如图，是用火柴棍摆的正方形，请你仔细观察第n个图形中共有（ ）根（用n的代数式表示）火柴棍．
右图表示某生态系统的食物网，关于此食物网的叙述，正确的是（）
完形填空
Hello! My 1 is Jim Smith. My first name is 2, and Smith is my 3 name.4am 5 English boy. What's that over there? Oh, it's my 6. It's an 7 dictionary. I like8 very much. 9 is it? It's red. Can you 10 dictionary? Yes, D-I-C-T-I-O-N-A-R-Y.
