左向右分流型先天性心脏病出现的肺血改变是()
A．肺充血
B．肺淤血
C．肺缺血
D．肺出血
E．以上都不是
参考答案：A
If you reach the top of the mountain, everything around ______ clearly. [ ]
A. can see
B. will see
C. is seen
D. will be seen
It may be dangerous _____ a car _____ a snowy day. [ ]
A. to drive, in
B. to drive, on
C. drive, in
D. drive, on
