Is true that Americans eat hamburgers and hot dogs every day? A. this B. anything C. those D. it
If you have failed in the past to try to make big changes in life，try again now，one tiny step at a time． Every year it's the same．As December comes to an end，you think about the new year and
如图所示，+Q1和-Q2是两个可自由移动的电荷，且Q2=4Q1。现再取一个可自由移动的点电荷Q3放在Q1与Q2连接的直线上，欲使整个系统平衡，那 A．Q3应为
—When did your cousin begin to show his interest in medicine? —It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab. A. that B. what
若方程x2+kx+9=0有两个相等的实数根，则k= ．
7.(山东)下列各句中，加点的成语使用正确的一项是(3分)( ) A 新闻发布会上，他讲话仅用了八分钟，简介明了，新闻性、针对性强，没有一句穿靴戴
—The lecture to be given by the Nobel Prize winner has been canceled?—Oh, no! _____． A．It's wonderful B．It doesn't matter
