急性梗阻性化脓性胆管炎患者哪项检查不合适（） A.B超 B.PTC C.ERCP D

If you are riding a bike in foreign countries, you need to know what these traffic signs mean.

1		This sign means “walk”, you can cross the street along with other people.
2		This sign is the “don’t walk” sign. It means you should stop to wait for a while until the sign of “walk” is showing.
3		This sign means that there is a bike lane. If you see such a sign, you must use the bike lane.
4		Car drivers and bike riders must come to a complete stop at “STOP” signs.
5		This sign means you are coming to a zebra crossing. You must slow down to allow people in the zebra crossing to cross the street.
6		This sign means parts of the road are rough. Be careful! Rough roads make you fall off your bike.

小题1:Which of the following signs means “walk”?

A．

B．

C．

D．

小题2:What should bike riders do when they see the sign?

A．To ride against traffic.

B．To ride on the left side of the road.

C．To ride on the bike lane.

D．To ride on the right side of the road.

小题3:Which of the following sign has the same meaning as the sign?

A．

B．

C．

D．