关于胰腺假性囊肿以下正确的是()
A.包膜由上皮细胞形成
B.大约4~6周可成熟
C.不可能自行吸收
D.常表现为急腹症
E.常需外科手术切除
参考答案:B
— It remains ______ whether Dave will be fit enough to play in the finals.
— Oh, no! Without him, we will lose the game. [ ]
A. seen
B. to be seen
C. seeing
D. to see
如图所示,弹簧测力计的示数为_____N,由此可算得该物体的质量为_____kg.