子宫内膜增殖期变化发生在月经周期的第（）。
A.5～14天
B.15～24天
C.1～4天
D.25～28天
E.10～12天
参考答案：A
—What do you think of the lecture of Li Yang's Crazy English?
—I think it's _________, but someone thinks it's much too ________[ ]
A. wonderful enough ; bore
B. enough wonderful; boring
C. wonderful enough ; boring
D. enough wonderful; bored
单结晶管的用途是（）。
A.作放大器
B.作整流器
C.作振荡器
