下面是植物细胞的平面结构模式图，请据图回答问题：

（1）切西瓜时，流出的红汁水是__________，这些汁水主要来自图中的结构[　]__________。　　

（2）图中结构可以缓缓流动的部分是[　]_________，它流动的意义是：能够加速_________与________进行______________。　　

（3）结构c里面含有______物质。　　

（4）结构b的功能是起_______作用和控制______的进出。　　

（5）图中起保护和支持作用的结构是[　]_________。

Robert Necco and Nelson Packard are economists at Economic Research Associates. ERA asks Necco and Packard for their opinions about the effects of fiscal policy on real GDP for an economy currently experiencing a recession. Necco states that real GDP is likely to increase if both government spending and taxes are increased by the same amount. Packard states that if both government spending and taxes are increased by the same amount, there is no expected net effect on real GDP. Regarding the statements made by Necco and Packard: Necco Packard（）①A. Correct Correct ②B. Correct Incorrect ③C. Incorrect Incorrect

A. ①

B. ②

C. ③