目前世界上最大的螺旋桨的直径已超过()m。
A.5
B.6
C.8
D.10
参考答案:C
With all the food supply ___, the researchers had to put an end to the wildlife protection project and returned home.
A.running out
B.to use up
C.run out of
D.using up
旋喷地基质量可采用哪些方法进行检验