It's time _____________ lunch.[ ]
A. have
B. to have
C. has
D. having
答案:B
单纯性甲状腺肿可选用()。
A.小剂量碘
B.大剂量碘
C.放射性碘
D.硫脲类
E.β受体阻滞药
在北半球,船舶处于右半圆,观测到风向呈顺时针变化时抛抗台八字锚,应:()
A.先抛左锚,后抛右锚,出链左长右短
B.先抛右锚,后抛左锚,出链左长右短
C.先抛左锚,后抛右锚,出链右长左短
D.先抛右锚,后抛左锚,出链右长左短