In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your answer sheet. Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions. Now listen to the interview. If parents want to know how they spend the money, they should
A. figure out where the money goes.
B. take a piece of paper with them.
C. budget for a baby every day.
D. note down every expense.
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生物群落的______结构是指生物群落的配置状况或水平格局,它包括生物群落的镶嵌性、两个以上的生物群落有规律地重复交替的结构格局、生物群落复合体和生物群落的交错区。
随着密度增加,没有领域或没有配偶的生物个体比例将增加,它们最易受不良天气和天敌的危害。如果这部分生物个体比例增加,会使生物种群的增长速率______。
犬科、猫科和啮齿类动物把含有特殊气味或外激素的粪尿或身体的其他分泌物涂撒在比较暴露的地方,如树干、石头、草丛上。这种行为是动物的______行为。
患者,女,25岁,已婚,停经50天,阴道少许出血3天,今晨突发右下腹剧痛伴明显肛坠,血压80/50mmHg,脉搏120次/分,下腹部有压痛,反跳痛,移动性浊音(+)。妇科检查:宫颈举痛,子宫略大稍软,右附件增厚有压痛 最适宜的紧急处理是
A. 输血积极抗休克
B. 纠正休克后再考虑手术
C. 即刻开腹探查
D. 边纠正休克边行开腹术
E. 可给中医中药止血治疗