An aneroid barometer is an instrument().
A. used to measure the speed of wind
B. in which the pressure of air is measured
C. that tells which dirction a storm is coming from
D. used to measure the height of wave
“凡劳苦担重担的人可以到我这里来”出自马太福音哪章哪节?
向尾水管里补气,主要是为了减少()汽蚀对机组运行的影响。
A. 间隙
B. 局部
C. 翼型
D. 空腔
封发邮件总包,按规定不得使用袋身有二厘米以上破洞的邮袋。
A. 正确
B. 错误