【单选题】如图所示,边长为2a的正方形薄板,剪掉四分之一后用细绳悬挂在A点,预使上边BD保持水平状态,求悬挂点与B端距离x的值。 【图片】
【单选题】Shirky and Starkman share views on______.
A.
the value of traditional newspapers
B.
the prospect of newspapers
C.
the impact of technology on newspapers
D.
the quality of newspaper contents
【单选题】In the author's opinion, what is most important in shaping a generation?
B.
Unfavorable conditions.
C.
A world without megachanges.
【单选题】The environment is exactly everything that affect us in some_____.