问题
单项选择题
如图1,BC是半圆的直径,且BC=4,∠ABC=30°,则图中阴影部分的面积为()。
A.
B.
C.
D.
E.
答案
参考答案:A
解析:
如图1,BC是半圆的直径,且BC=4,∠ABC=30°,则图中阴影部分的面积为()。
A.
B.
C.
D.
E.
参考答案:A
解析:
用方框中所给单词的适当形式填空。 | |
2. As we know, China is still a _______ country in the world. 3. Bruce succeeded in _______ the English exam. 4. Water is becoming less and less, so you aren't supposed to _______ every drop of water. 5. My grandpa has seen the changes in Lianjiang _______. |