大肠癌血行转移最常转移至()
A.肝
B.肺
C.骨
D.膀胱
E.肾
参考答案:A
解析:大肠癌血行转移常引起肝转移,其次为肺转移、骨转移等。故本题选择A。
Now that there are still some problems remaining ______, we have to work extra hours tonight.
A.solved
B.solving
C.to be solved
D.to solve
将一实心物体先后投入足量的水和酒精中,物体静止时,所受浮力分别为6N和5N,判定物体在水、酒精中的浮沉状态可能是(ρ酒=0.8×103kg/m3)[ ]
A.在水中漂浮,在酒精中漂浮
B.在水中漂浮,在酒精中沉底
C.在水中悬浮,在酒精中漂浮
D.在水中沉底,在酒精中沉底