男性，35岁，阵发性全腹痛3天，以右下腹为重，伴肠鸣。1天来腹痛加剧，并呕吐数次未再进食，伴排便、排气消失，尿少。患者2年前曾因急性阑尾炎行阑尾切除术。BP100/60mmHg，P124次／分，T37，6℃，皮肤弹性较差，腹稍胀，未见蠕动波，未触及包块，肠鸣音亢进，可闻及气过水声，WBC10，6x109/L，HB160g／L。
哪项诊断的可能性最大
A. 绞窄性肠梗阻
B. 单纯性高位小肠梗阻
C. 单纯性循位小肠梗阻
D. 急性乙状结肠扭转
E. 急性水肿性胰腺炎
查看答案
【C2】
A. complicated
B. delicate
C. subtle
D. unique
According to the passage, which of the following statements is true？
A. Scientists have managed to know more things about asteroid 1950 DA.
B. Many people seem to be worried about the predicted asteroid smash.
C. Scientists are still quite optimistic about man"s future.
D. The Earth is faced with frequent threats from space.
【C1】
A. taken
B. pieced
C. kept
D. made
某正弦交流电压为u＝311sin(100πt-π/3)V，它的电压有效值为()V。
A. 311
B. 100
C. 220
D. 380
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