A. larger than the party above the water B.
stay near the iceberg C. melt away just as unnoticed
D. larger crystals E. stay away from iceberg
F. above the water
Even in clear weather one is wise to______. 参考答案:E 答案解析:[解析] 第三段第二句告诉我们“Even in clear weather one is wise t0 stay a safe distance away from them.”即便是在晴朗的天气里
第21题: [单项选择]绝经过渡期阴道流血最常见原因是 A. 子宫内膜息肉 B. 生殖道外伤 C. 生殖器肿瘤 D. 无排卵性功血 E. 排卵性功血 参考答案:D