⑴Doing more exercise is good for health. ____
⑵I feel cold. I need to wear warm clothes. ____
⑶You should see a doctor when you are ill. ____
⑷If you are angry, you'd better take a deep breath and count to ten. ____
A.
B.
C.
D.
如图所示,在质量为M的小车中挂有一单摆,摆球的质量为m0,小车(和单摆)以恒定的速度v沿光滑水平地面运动,与位于正对面的质量为m的静止木块发生碰撞,碰撞的时间极短.在此碰撞过程中,下列哪个或哪些说法是可能发生的?( )
惊恐____ 欺侮____ 可恶____ 凄惨____
警戒____ 预备____ 假若____ 集合____
A.稀硫酸 B.浓硫酸 C.氢氧化钠 D.氯化钠 E.熟石灰
纬度位置最高的大洲是( )