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问题 多选题

学习生物学知识时，如果用流程图将连续发生的一系列生理活动联系起来，便于我们梳理和掌握．下面的流程图正确的是（　　）

A．外界声波→外耳道→鼓膜→听小骨→内耳→听觉神经→大脑

B．外界刺激→感受器→传入神经→神经中枢→传出神经→效应器

C．外界光线→角膜→瞳孔→晶状体和玻璃体→视网膜→视觉神经→大脑

D．左心室→主动脉→各级动脉→全身毛细血管网→各级静脉→上下腔静脉→左心房

答案

ABC

单项选择题

The following two questions refer to the following passage:

A prestigious private high school has made available to local families a tuition prepayment plan to ease the burden of paying the school’s hefty tuition when a student matriculates. The plan allows parents of children under three years old to reserve a spot for their child at the school by making a payment of one-fourth of the current annual tuition for the high school. The parents then make an identical payment every year for the next 15 years, and the student’s full four-year tuition is considered paid in full, regardless of how much the regular tuition payments have risen in the intervening years.

Under which of the following circumstances would it be advisable for parents to take part in the prepayment plan ？（）

A. If the school assures parents that participation in the prepayment plan will be taken into consideration when the school admissions council makes decisions about which first-year students to admit to the school

B. If the parents are certain that their child will attend this high school, and if the rate of tuition increase would surpass the rate of return that the parents could earn if they invested the same 16 payments in interest-bearing investments of their own choosing

C. If the children of other parents who have taken part in the prepayment plan have been successful at the high school and gone on to enroll at Ivy League universities

D. If the parents feel that this high school will provide the best educational, athletic, and social experience that their child could receive

E. If the school can guarantee that its level of prestige at the time of the student’s matriculation will be as great as or greater than its current level
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问答题

2013年3月18日，甲机械公司与乙融资租赁公司接洽融资租赁某型号数控机床事宜。同年4月1日，乙按照甲的要求与丙精密设备公司签订购买一台某型号机床的买卖合同。丁以保证人身份在该买卖合同中签字，但该买卖合同没有保证条款，且丁未与丙另行签订保证合同。　　乙和丙签订的买卖合同中约定，机床价款1200万元。乙在缔约当日支付首期款400万元，丙在收到首期款一个月内将机床交付给甲。乙在机床交付后8个月内，每月支付100万元。　　2013年8月3日甲未通知乙，以机床所有权人的身份将机床以市场价卖给戊，戊不知甲是承租人的身份，在收到机床后付清价款。乙知悉上述情况后，以甲不是机床所有人为由主张甲戊之间的合同无效，且主张自己是机床所有权人，要求戊返还机床。　　2013年11月2日，由于乙连续3个月未支付机床价款共计300万元，丙要求乙一次性支付剩余的到期和未到期的500万元价款，乙认为丙无权要求自己支付未到期的200万元，并以此为由未支付任何价款。丙遂要求丁承担保证责任。丁拒绝，理由有两个：(1)丁仅以保证人的身份在该买卖合同中签字，买卖合同并不存在保证条款，且丁未与丙另行签订保证合同，因此，保证合同未成立；(2)即使保证合同成立，由于合同中未约定为连带责任保证，因此，丁只承担一般保证责任，丙不应该在人民法院强制执行乙财产之前要求丁承担保证责任。　　要求：　　根据上述资料，回答下列问题。

丁关于保证形式为一般保证的主张是否符合规定并说明理由。
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