下列哪幅图能正确地反映我国地势的基本特征( )
A:
B:
C:
D:
治理黄河“地上河”的关键是( )
A. Leo took the drawing lesson.
B. He likes the colours.
C. I like the one on the left.
D. She likes the horses. The horses look powerful.
It struck me that we ought to make a new plan.
A
First
class
9:00—
9:40
Second
9:50—
10:30
BREAK
(休息)
Third
11:00—
11:50
Fourth
13:00—
13:40
Fifth
13:50—
14:30
Mon.
English
Science
Music
Math
P.E.
Tue.
Geography
Art
History
Wed.
IT
Thu.
Fri.
用如图1所示的实验装置验证机械能守恒定律.实验所用的电源为学生电源,输出电压为6V的交流电和直流电两种.重锤从高处由静止开始下落,重锤上拖着的纸带打出一系列的点,对纸带的点痕进行测量,即可验证机械能守恒定律.