题目内容

29.Which is the cheapest option for a solar system?

A. Pay for it completely.
B. Lease it somehow.
C. Sell all the electricity generated.
D. Get bank loans for it.

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A. use the electricity for free
B. pay more than the local utility charges you
C. pay the maintenance fees
D. sign a power purchase agreement

A. 肺动脉高压
B. 慢性阻塞性肺疾病
C. 静脉血栓脱落致肺动脉栓塞
D. 右心室心肌肥大
E. 胸膜纤维化

A. 央气道胸外段阻塞
B. 周气道阻塞
C. 吸中枢受损
D. 廓肺的顺应性降低
E. 腔样通气

A. 动脉高压
B. 肌缺血缺氧
C. 肌细胞凋亡过度
D. 重心律失常
E. 吸性酸中毒