病人出现黑便时，上消化道出血量应达
A. 500 ml以上
B. 200 ml以上
C. 100 ml以上
D. 60 ml以上
E. 10 m1以上
How much did Fred pay for his car（）
A. He paid half the price the salesman asked.
B. He paid twice as much as the salesman asked.
C. He paid the price the salesman asked.
D. He needn’t have paid that much for the car.
13（）
A. However
B. Therefore
C. Meanwhile
D. Subsequently
长期高血压易导致哪些脏器出现并发症
A. 心、肺、脑
B. 心、肝、肾
C. 心、脑、肾
D. 肝、肾、脑
E. 肝、肾、肺
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