船舶逆流航行,在选择航路时应综合考虑()等因素。
A. 缓流区航道水深分布及位置
B. 过河航行的次数
C. 本船的操纵性能
D. 以上都对
That trading company in Tokyo did consider()the transaction with you.
A. concluding
B. toconclude
C. conclude
D. conclusion
选择保温材料时,一般要求其导热系数()w/(m.℃)。
A. <0.023
B. <0.23
C. >0.023
D. >0.23