既能息风止痉,平抑肝阳,又能祛风通络的药物是()
A.夏枯草
B.白僵蚕
C.天麻
D.决明子
E.代赭石
参考答案:C
一个小球做自由落体运动,在第1s内重力做功为W1,在第2s内重力做功为W2;在第1s末重力的瞬时功率为P1,在第2s末重力的瞬时功率做功为P2,则W1:W2及P1:P2分别等于( )
A.1:1,1:1
B.1:2,1:3
C.1:3;1:2
D.1:4,1:2
在下列各句的每个空格内填上一个适当的单词,该词的首字母已给出。
1. When I go out for a walk after supper, my little dog always f me.
2. Work h , or you will fail in the exam.
3. At present, we should pay more a to the quality of all kinds of food.
4. Before joining the army, everyone has to have a m examination.
5. Jack doesn't like pop music but he e light music.