由于转弯行驶增加的滚动阻力,已接近直线行驶时的()
A. 20~50%
B. 50~100%
C. 5~10%
D. 200%
----- Dad ,look at the building .It is on fire.----- Call 119 ____________ mobile phone right now
A. in
B. by
C. on
D. with
----- A heavy snow hit most of the parts of China in January,2008.----- ____________ terrible news!
A. How a
B. What a
C. How
D. What
根据我国的公路工程技术标准,平原微丘区I级路面最大坡度为()%,山岭重丘区I级路面最大坡度为9%。
A. 2
B. 4
C. 7
D. 9