英版海图图式“PipelineArea”的含义是（）。A．禁航区 B．检疫锚地 C．

______ to too much sunlight, as is generally considered, will add to the potential of catching skin cancer.

A．Being exposed

B．Exposed

C．Exposing

D．To expose

30. It is a good city for cycling because it is flat and ________is convenient for bikes.

A．however

B．what’s more

C．therefore

D．Besides

_______ my job, I had to move to Jinhua.[ ]

A. Because of      

B. Because      

C. With the help of      

D. With

心悸证型中，宜在膈俞行刺络拔罐法治疗的是（）

A.心肝火旺

B.心脉瘀阻

C.阴虚火旺

D.水气凌心

E.心肾不交

背向散射回声强度的射频测定在超声造影技术上有什么用途（）

A.用于定量评价超声造影效果

B.加速血流速度

C.增大血流量

D.增强超声造影效果

E.消除超声造影的副作用