计算:
|-3|+(-7)-(-3)。
解:原式=3-7+3
=-1。
---Would you like to go fishing with me tomorrow ?
---Sorry, I don’t like fishing. How about _________?
A.go swimming
B.go swim
C.going swimming
D.go to swim
关于进行性血胸,下列叙述哪项不正确
A.脉搏逐渐增快,血压持续下降
B.经输血补液后,血压不回升或升高后又迅速下降
C.胸穿抽不出血,但X线检查显示胸膜腔阴影继续增大
D.闭式胸膜腔引流后,引流血量持续2小时,每小时超过200ml