下列不是造成铸件不完整原因的是（）。
A.铸道直径太细
B.铸道太长
C.铸圈温度过低
D.投入金属量不足
E.没有储库
参考答案：E
Choose the right answers to the given questions. 为下列问句选择正确的答案。
( ) 1. How's the weather today?
( ) 2. What is the fifth month of the year?
( ) 3. What's the date?
( ) 4. When is lunch?
( ) 5. What day is it?
A. May.
B. It's Saturday.
C. It's 12:30.
D. It's September 10.
E. It's warm and sunny.
眼底的改变可以反映高血压的严重程度。按照"Keith-Wagener"眼底分级法，眼底改变Ⅲ级是指（）
A.视网膜动脉狭窄
B.视神经 * * 水肿
C.视网膜动脉变细
D.眼底出血或渗出
E.动脉交叉压迫
