心肌梗塞的并发症室壁瘤经常发生在()。
A.左室前壁
B.室间隔
C.心尖
D.右室
E.左室下壁
参考答案:C
At the meeting, the professor presented a new __________ to foreign languages.
A.way
B.approach
C.method
D.means
时钟在4点半时,时针与分针的夹角为 度.