颅内转移性黑色素瘤多来自()。
A.消化道
B.皮肤
C.骨骼
D.肺部
E.软脑膜
参考答案:B
解析:黑色素瘤分为原发性和转移性。颅内转移性黑色素瘤多来自皮肤的黑色素瘤经血转移。
按要求完成下列句子。
1. He has a brother and a sister. (改为一般疑问句)
____ he ____ any brothers or sisters?
2. Open the windows. (改为否定句)
____ ____ the windows.
3. What time is it? It's time to have dinner. (改为近义句)
____ the time? It's time ____ dinner.
4. She saw the Beijing Opera show last Friday. (对画线部分提问)
__ _ ____ she ____ the Beijing opera show?
5. The man in blue is Su Yang's uncle. (对画线部分提问)
____ man is Su Yang's uncle?
6. Jim is good at PE. (改为同义句)
Jim ____ ____ in PE.
7. We saw a play last Sunday. (用tomorrow替换last Sunday)
We are ____ ____ see a play tomorrow.
反射弧