问题
单项选择题 A1/A2型题
视网膜母细胞瘤的MRI表现是（）
A.A
B.B
C.C
D.D
E.E
答案
参考答案：B
解析：视网膜母细胞瘤可向前突入玻璃体或在视网膜下生长，也可呈弥漫性生长。肿块在T1WI信号强度等于或稍高于玻璃体，T2WI呈中等信号，较玻璃体信号低，增强扫描肿瘤瘤体明显强化。
搜题请搜索小程序“爱下问搜题”
视网膜母细胞瘤的MRI表现是（）
A.A
B.B
C.C
D.D
E.E
参考答案：B
解析：视网膜母细胞瘤可向前突入玻璃体或在视网膜下生长，也可呈弥漫性生长。肿块在T1WI信号强度等于或稍高于玻璃体，T2WI呈中等信号，较玻璃体信号低，增强扫描肿瘤瘤体明显强化。
Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.
| I found, while thinking about the far-reaching world of the creative black woman, that often the truest answer to a question that really matters can be found very close. In the late 1920s, my mother ran away from home to (51) my father. Marriage, if not running away, was (52) of seventeen-year-old girls. By the time she was twenty, she had two children and was pregnant (53) a third. Five children later, I was born. And this is how I (54) to know my mother: she (55) a large, soft, loving-eyed woman who was (56) impatient in our home. Her quick, violent temper was on (57) only a few times a year, when she (58) with the white landlord who had the misfortune to suggest to her that her children did not need to go to school. She made all the clothes we wore, even my brother’s (59) . She made all the towels and sheers we used. She spent the summers canning vegetables and fruits. She spent the winter evenings making quilts (60) to cover all our beds. |
A．frequently
B．always
C．often
D．rarely