下列哪项糖尿病并发症是患者的主要死亡原因（）。
A.脑血管并发症
B.心血管并发症
C.酮症酸中毒
D.糖尿病肾病
E.心、脑血管并发症
参考答案：E
飞机保险一般采用()方式。
A.定值保险
B.不定值保险
C.定额保险
D.再保险
用括号内所给形容词的适当形式填空。
1. Mr Read is very _____ (short).
2. She is _____ (old) of us all.
3. I think diving is _____ (difficult) activity of all.
4. English is _____ (important) than math.
5. Kitty has _____ (little) milk of the three.
