—He's a newspaper.
A:what; looking
B:How; looking
C:How; reading
D:what; reading
_________ should not be allowed to go out at night.
____
氢气____;木炭____;五氧化二磷____;
水____;Fe3O4____; MnO2____。
在下面的8×8的格子方框中(每个格子均为1 )分出画出面积为1.5 的三角形,2.5 的直角梯形和面积为4 的梯形(不能存在直角)