【单选题】The has been greatly increased this year in our office.
【单选题】is generally accepted that the social status of women has been greatly improved nowadays.
【简答题】The quality of our products has been greatly improved.
【多选题】( 多选 ) 简谐运动的振动图线可用下述方法画出:如图甲所示,在弹簧振子的小球上安装一支绘图笔 P ,让一条纸带在与小球振动方向垂直的方向上匀速运动,笔 P 在纸带上画出的就是小球的振动图像。取振子水平向右的方向为振子离开平衡位置位移的正方向,纸带运动的距离代表时间,得到的振动图线如图乙所示。下列说法正确的是 ( )
C.
. t = 17 s 时振子相对平衡位置的位移是 10 cm
D.
.若纸带运动的速度为 2 cm /s ,振动图线上 1 、 3 两点间的距离是 4 cm
E.
. 2.5 s 时振子正在向 x 轴正方向运动
【多选题】简谐运动的振动图线可用下述方法画出:如图甲所示,在弹簧振子的小球上安装一支绘图笔 P ,让一条纸带在与小球振动方向垂直的方向上匀速运动,笔 P 在纸带上画出的就是小球的振动图像。取振子水平向右的方向为振子离开平衡位置位移的正方向,纸带运动的距离代表时间,得到的振动图线如图乙所示。下列说法正确的是 ( )
C.
t = 17 s 时振子相对平衡位置的位移是 10 cm
D.
若纸带运动的速度为 2 cm /s ,振动图线上 1 、 3 两点间的距离是 4 cm
【单选题】The quality of our products has been greatly improved.
【单选题】What does the professor imply about the use of colors in newspapers?
A.
It has been greatly influenced by reader preferences.
B.
It is more effective than early research indicated.
C.
It has not resulted in significant increases in the number of readers.
D.
It has been neglected in the study of journalism.
【单选题】The incidence of this disease has been greatly reduced thanks to our health care program.
B.
frequency of occurrence
【单选题】The scientist has been greatly successful in the experiment that he _____ to do three years ago. [ ]
【单选题】The _______ income of the common people has been greatly increased in the past thirty years ______ the reform and opening-up policy in China.
C.
normal; on an account of