柴油机（）不是压力润滑，而是利用曲轴箱内飞溅起的机油进行润滑。
A.曲轴和凸轮轴轴承
B.连杆铜套与活塞销之间
C.缸套与活塞之间
参考答案：C
下列叙述与提高光能利用率密切相关的是
①合理密植能够增加光合作用面积 ②适当增加光照强度，满足阳生植物需求 ③轮作能延长光合作用时间 ④适当增加CO2的浓度，提供充足原料[ ]
A．仅一项
B．仅两项
C．三项
D．全部
Consider the following two statements about put-able bonds: Statement 1: As yields rise, the price of put-able bonds will fall more quickly than similar option-free bonds (beyond a critical point) due to the decline in value of the embedded put option. Statement 2: As yields fall, the price of put-able bonds will rise more quickly than similar option-free bonds (beyond a critical point) due to the increase in value of the embedded put option. Should an analyst agree or disagree with these statements Statement 1 Statement 2（）①A. AgreeAgree ②B. Disagree Disagree ③C. AgreeDisagree
A. ①
B. ②
C. ③
