利用柏努利方程计算流体输送问题时,要正确选择合理的()条件,对方程两侧的静压能,当都与大气相通时应选()。
参考答案:边界;1atm
根据所提供的句子意思,将所给单词的正确形式填空,使句子意思完整。并在答题卡上将答案填写在对应题号的横线上。
小题1:I think MoYan is a great (write).
小题2:An elephant is one of the ______ (big) animals in the world.
小题3:Father’s Day is on the (three) Sunday in June each year.
小题4:They decided (work) hard from now on.
小题5:We are excited about the (excite) news.
小题6:Look!There (be) a lovely bird singing in the tree.
小题7:We should (help)the people who are in trouble in Ya’an .
小题8: (luck), all the people were saved in the accident.
小题9:The girl is very clever. She learns English by (her).
小题10:Would you mind (open) the windows? It’s too hot.
( )输华货物,须提供官方出具的符合要求的植物检疫证书或出口商出具的“非针叶树木质包装声明”或“非木质包装声明”方可受理报检。
A.美国、加拿大
B.日本、香港
C.加拿大、香港
D.美国、日本