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鼻窦炎可引起头痛。()

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In Figure 2, at which of the following wavelengths does the rate of photosynthesis exceed

A. 400 nm
B. 430 nm
C. 630 nm
D. 700 nm

Based on Figure 3, for a given seismograph, the time elapsed between the arrival of the first p-waves and the arrival of the first s-waves from an earthquake focus 10,500 km away would most likely be:

A. less than 5 min.
B. between 5 min and 7 min.
C. between 8 min and 10 min.
D. more than 10 min.

过滤器由本体、管道、滤网等组成，其典型泄漏情况和裂口尺寸分别取管径的20u/o～1000/0和()。

喷托维林既有中枢镇咳作用又有外周镇咳作用。()