皮皮学，免费搜题
登录
搜题
【判断题】
药物的LD50和ED50的比值称为治疗指数。此数值越小药物越安全。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】1 When America had an energy crisis, our leaders responded by creating the Department of Energy. When we perceived shortcomings in our schools, the Department of Education was formed. Likewise, the te...
A.
Because he also thinks of it as necessary.
B.
Because the Congress is obedient to the President.
C.
Because it is a symbol of the leaders' active response.
D.
Because terrorism is hard to crack down.
【单选题】40 Public lands can be used for energy development when_____.
A.
energy development restrictions are effective.
B.
federal land managers grant permissions.
C.
they go through the land use planning process.
D.
there is enough federal budget.
【单选题】When it comes to fighting poverty, the Harlem Children's Zone______.
A.
stresses more on crime prevention
B.
emphasizes an all-around system
C.
condemns parents as a hindrance
D.
sees excellent education as the sole way
【单选题】The cells of your body develop supplies of energy ______.
A.
when you are asleep
B.
when you recover from your work of the day
C.
in the next period of activity
D.
when you are quiet
【单选题】关于Adobe Illustrator矩形、椭圆形及圆角矩形工具的使用,下列的叙述不正确的是
A.
如果以鼠标单击点为中心绘制矩形、椭圆及圆角矩形，使用工具的同时按Alt键就可实现
B.
如果以鼠标单击点为中心绘制矩形、椭圆及圆角矩形，使用工具的同时按Shift键就可实现
C.
在绘制圆角矩形时，如果希望长方形的两边呈对称的半圆形，可在圆角矩形对话框中使圆角半径值大于高度的一半
D.
如果欲显示图形的中心点，首先确定图形处于选择状态，然后在属性面板上单击显示中心按钮
【单选题】关于Adobe Illustrator矩形、椭圆形及圆角矩形工具的使用,下列的叙述不正确的是?
A.
在绘制矩形时，起始点为右下角，鼠标只需向左上角拖移，便可绘制一个矩形
B.
如果以鼠标单击点为中心绘制矩形、椭圆及圆角矩形，使用工具的同时按Shift键就可实现
C.
在绘制圆角矩形时，如果希望长方形的两边呈对称的半圆形，可在圆角矩形对话框中使圆角半径值大于高度的一半
D.
如果欲显示图形的中心点，首先确定图形处于选择状态，然后在属性面板上单击显示中心按钮
【单选题】Public lands can be used for energy development when __________. 查看材料
A.
energy development restrictions are effective
B.
federal land managers grant permissions
C.
they go through the land use planning process
D.
there is enough federal budget
相关题目：
参考解析：
知识点：
题目纠错 0
发布
