题目内容

______from space, our earth, with water covering 70% of its surface, appears to be a blue ball.

A. Seen
B. Seeing
C. Having seen
D. To see

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A. 有迅速而持久的降压作用
B. 对小动脉和小静脉均有明显的舒张作用
C. 降压时不影响肾血流量
D. 能抑制血管平滑肌细胞外钙离子往细胞内转运
E. 可用于充血性心衰的治疗

A. the more bored became I
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C. the more I become bored
D. I became the more bored

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C. 肝门静脉
D. 肝静脉
E. 肺

A. 腹痛
B. 恶心、呕吐
C. 发热
D. 腹泻
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