引起血管内溶血的疾病是 ()
A.地中海贫血
B.脾功能亢进
C.遗传性球形细胞增多症
D.异常血红蛋白病
E.阵发性睡眠性血红蛋白尿(PNH)
参考答案:E
如图,简单谐横波在t时刻的波形如实线所示,经过△t=3s,其波形如虚线所示。已知图中x1与x2相距1m,波的周期为T,且2T<△t<4T。则可能的最小波速为__________m/s,最小周期为__________s。
Kate didn't come yesterday, or you ________ her. [ ]
A. might have seen
B. were to see
C. had seen
D. would see