在80-5×9÷15这个算式中,应该先算减法.______.(判断对错)
80-5×9÷15
=80-45÷15
=80-3
=77
是先算乘法,再算除法,最后算减法.
故答案为:×.
Everybody on the spot was deeply touched by the bravery the young girl who took off her only blouse,
_____ the burns and ______ the mouth-to-mouth method to save the man who was in a coma (昏迷)
because of a bad electric shock. [ ]
A. wrapped; took advantage of
B. dressed; applied
C. did up; used
D. packed up; made use of
在钎焊温度下,钎料应具有良好的(),以保证充分填满钎缝间隙。
A.熔合性
B.湿润性
C.黏合性
D.流动性