问题
单项选择题
男性，40岁，
缺失，
近中舌向倾斜、不松动，余留牙完全正常。
为减小
所受的扭力，可选择（）
A．延伸卡环
B．对半卡环
C．RPI卡环
D．联合卡环
E．圈形卡环
答案
参考答案：C
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男性，40岁，缺失，近中舌向倾斜、不松动，余留牙完全正常。
为减小所受的扭力，可选择（）
A．延伸卡环
B．对半卡环
C．RPI卡环
D．联合卡环
E．圈形卡环
参考答案：C
It was a cold winter afternoon. Robert stopped for a moment as he crossed the bridge and looked down at the river below. There were hardly any 36 on the river. Near the bridge, however, almost direct below, 37 was a small canoe (独木舟), with a boy in it. The boy was wearing 38 and shivering (颤抖) with cold, Robert noticed. Just then he heard a cry, “Help! Help!” The cry 39 from the river. Robert looked down. The boy was 40 the water and his canoe was floating away. “Help! Help!” he called again. Robert was a good 41 . Taking off his clothes, he 42 into the river. The 43 water made him tremble all over, 44 in a few seconds he reached the boy. “Don’t be afraid,” he said and started to swim towards the river bank, 45 the boy with him. But at that 46 he noticed a large motor boat under the bridge. There were several people on the boat, all 47 in his direction. Robert 48 to swim towards the boat. “Give me a hand,” he shouted 49 he got near the boat. He 50 up into a row of faces. “It’s funny,” he thought. “They look so 51 .” Silently they helped the boy into the boat and 52 him in a blanket (毯子). But they did not move to 53 Robert. “Aren’t you going to pull me 54 , too?” “You!” said one of the men. Robert noticed that he was standing next to a large 55 . “You! Why, we were making a film and you spoiled (破坏) a whole afternoon’s work! You can stay in the water!”
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