积分与变量（）有关。 A．t，s，x B．s，t C．x，t D．s

在路口遇这种情形怎样通行？

A、鸣喇叭告知让行
B、直接加速转弯
C、让左方来车先行
D、减速缓慢转弯

If better use is ____ of your spare time, you'll make great progress in it. [ ]

A. spent        

B. made          

C. taken            

D. thought

_____ in London, he was eager to see the Big Ben. [ ]

A. To his arriving

B. Once his arrival

C. Upon his arrival

D. The moment arrived

患者，男，30岁。脘腹胀痛，喜热饮，遇冷则加剧，手足冰冷，舌苔白，脉弦紧有力。用药首选（）

A.元胡、川楝子

B.高良姜、香附

C.肉桂、干姜

D.丁香、小茴香

E.附子、干姜

一般入井人员必须戴的三件物品？入井人员三个严禁？