[单项选择]It can be inferred from the passage that foraminifers (Line 6, Para 4) are a ______. A. kind of weather pattern B. species of tundra plant C. form of sea life D. type of miniature penguin
第7题: [单项选择]治疗绝经过渡期功血() A. 用大量雌激素止血后人工周期治疗3个月 B. 孕、雌激素合并疗法减少月经量并调整月经周期 C. 自排卵后开始每日肌注黄体酮10mg,共10~14日 D. 孕激素长期应用 E. 于月经期前10~14天,肌内注射黄体酮10~20mg共5天 参考答案:B 答案解析:青春期功血者通常内源性雌激素水平较低,第1小题选A。育龄期月经周期过短的功血病人,多因黄体功能不足引起,可以采用黄体功能替代疗法,第2小题选C。绝经过渡期功血者的治疗原则在于止血后,调整周期、减少经量
第18题: [单项选择]Questions 26 to 28 are based on the passage you have just heard.A. It’s not comfortable. B. It is difficult to steer. C. It can’t go long distances without recharging. D. Its engine easily overheats. 参考答案:C 答案解析:[解析] What is the main drawback of an electric car
第35题: [单项选择]关于窝沟封闭剂,以下说法错误的是 A. 窝沟点隙呈Ⅴ形,封闭剂容易浸润渗透 B. 窝沟点隙呈口小里大,封闭剂容易浸润渗透 C. 窝沟封闭剂黏度太小,会导致固化后体积收缩大 D. 窝沟封闭剂黏度太大,会导致不易浸润渗透入窝沟点隙内 E. 窝沟封闭剂黏度太小,会导致固化强度降低 参考答案:B 答案解析:[解析] 窝沟点隙呈口小里大,窝沟封闭剂不容易浸润渗透。