1787年美国制宪会议经过多方讨论最终确定了国会建设方案，即康涅狄格方案：设立各州享有同等表决权的参议院和按人口数确定代表名额的众议院。据此可知，这一方案的目的是（ ）
A：制约总统的权力
B：实现各州相对平衡
C：确保国会的立法权
D：确立中央集权原则
在-（-8），|-1|，-|0|，（-2）3这四个数中非负数共有（ ）个．
⑴I'm hungry.____ A. She's running.
⑵What are you doing?____ B. He's making noodles.
⑶What are they doing?____ C. I'm hungry, too.
⑷What is she doing?____ D. They are rowing a boat.
⑸What is Sam doing?____ E. I'm reading a book.
For our safety, we'd better avoid ____ (go) out alone at night.
