单项选择题 若希望5年后取得1000元，利率为10%，则单利情况下现在应存入银行（） A、384.6 B、650 C、666.67 D、665.5

单项选择题 Refer to the following Figure. If the relative cost of aluminum were to rise, then the production possibilities schedule would: Figure: Production Possibilities Schedule

单项选择题 The isometric self-regulation of the myocardium regulates the pumping function of the heart by changing A、initial length of myocardium B、arterial pressure C、ventricular end-diastolic volume D、myocardial contractility