如图,在△ABC中,若BD平分∠ABC,则下列说法中不正确的是( )
A:∠ABC=2∠ABD
B:∠DBC=∠ABD
C:∠ABC=2∠DBC
D:∠BDC=∠ABC
磁性材料已经在现代生活和科学技术中广泛使用,下列元件中没有应用磁性材料的是( )
下列计算正确的是( )
材料一:近年来,我国轿车的价格每年呈约15%的下降趋势,“降价潮”席卷全国。几乎所有品牌的轿车都卷入“价格大战”中,以期在激烈的竞争中占有更多的市场份额。
材料二:随着我国经济的快速增长,汽车消费热点也渐趋成熟。汽车拥有量的快速增长,拉动了汽油、润滑油等石油加工业的发展,汽车服务业也得到了空前的发展,市场旺盛的需求使得汽车产业的发展前景仍很光明。
下列式子中是一元一次不等式的是( )
请从右栏中为左栏的图片选择相应的文字描述
Picture
Description(描述)
① ____
A. Aren't they lovely? They walk on the ice and snow. They can also swim. Do you want to know more about them?
② ____
B. Do you often watch him play basketball? If you do so, what do you think of him? Good or awesome(令人敬畏的)?
③ ____
C. — I can't find my keys.
— Let me help you.
④ ____
D. — Where's your pen friend from?
— Sydney. Oh, it's in Australia.
⑤ ____
E. Do you enjoy playing soccer? Look! They often play after school. How excited they are!