穿心莲具有的功效是
A.凉血B.养阴C.止血D.燥湿E.利水
参考答案:D
They became friends again that day. Until then, they __________ to each other for nearly two years.
A.didn’t speak
B.hadn’t spoken
C.haven’t spoken
D.haven’t been speaking
号称‚中国规模最大的休眠期天然火山博物馆‛的是().
A.五大连池火山群
B.乔官火山群
C.长白山火山群
D.腾冲火山群