He likes playing tricks on others, but _________, he is a good boy. He is willing to help others.
A:in this way
B:in some ways
C:in his way
D:on his way
上海东方明珠电视塔高约四百六十八米。(写作:____)
买一辆自行车大约需要二百七十元。(写作:____)
质量为m的物体在距地面h高处,以a= 2g3 的加速度竖直下落到地面,下面的说法正确的是( )