中风发生的病因为（）
A.积损正衰
B.房室劳累
C.劳倦内伤
D.五志所伤，情志过极
E.脾失健运，痰浊内生
参考答案：A, B, C, D, E
铅蓄电池的电动势为2 V，这表示 [ ]
A．电路中每通过1 C电荷量，电源把2 J的化学能转变为电能
B．无论接不接入外电路，蓄电池两极间的电压都为2 V
C．蓄电池在1 s内将2 J的化学能转变为电能
D．蓄电池将化学能转变为电能的本领比一节干电池(电动势为1.5 V)的大
看图完成对话。
① A: Where is the ball?
B: ________________
②A: Where are the pictures? Are they on the wall?
③A: Where are the socks?
B : One (一只 ) is _________________ the bed ,and the other(另一只 ) is ____________.
④A: Is the ruler on the floor?
B : No , it isn't. _____________________
⑤A: Where is the shirt?
B: I don't know. ____________________
Y: Yes,it is. ___________________
