潮流流向的周期变化是怎样的？

世界七大洲中，海岸线最为曲折的大洲是(   )

A．亚洲

B．欧洲

C．非洲

D．南美洲

The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as       of a great number of services.

A．the one

B．that

C．ones

D．those

经期或经后小腹冷痛，喜暖喜按，经量少色淡暗，脉沉，舌苔白润，治法是

A.散寒除湿止痛 

B.益肾养肝止痛 

C.温经暖宫止痛 

D.散寒化瘀止痛 

E.益气养血止痛

新生儿破伤风，药物的正确选择是（）

A.红霉素

B.庆大霉素

C.青霉素

D.头孢拉定

E.氨苄西林

A (66) holds enough bits to store a single character while a (67) is a group of bytes.

A．bit

B．byte

C．word

D．character