区别癌与肉瘤的主要依据是()。
A.浸润性生长、无包膜
B.异型性明显,有核分裂象
C.常通过血道转移
D.表达不同的细胞骨架蛋白
E.肿瘤体积巨大
参考答案:D
---- Have you bought the newly-produced equipment on display?
----- Not yet, for I still prefer ______ at my home.
A.the one
B.it
C.that
D.one
导致肺炎球菌肺炎低氧血症的原因是
A.支气管痉挛B.痰液阻塞呼吸道C.高热D.V/Q<0.8