问题
单项选择题
关于染色体病，不正确的叙述是（）.
A.B超检查可确诊
B.以常染色体数目异常为多见
C.染色体病的胎儿有时死于宫内，发生反复流产
D.21-三体综合征属染色体病
E.原位杂交技术可诊断
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
关于染色体病，不正确的叙述是（）.
A.B超检查可确诊
B.以常染色体数目异常为多见
C.染色体病的胎儿有时死于宫内，发生反复流产
D.21-三体综合征属染色体病
E.原位杂交技术可诊断
参考答案：A
| 从给选项中选择恰当的句子完成对话。 | |
Mary: 1 Tom: why do you like it? Mary: 2 It saves a lot of time and I needn't leave home to buy things. I just click the mouse to order what I like. Tom: 3 Mary: Yes. I bought a car online last month. It was very nice. Tom: 4 Mary: Yes. They send the things you buy to your home. Tom: Oh. Thank you. 5 Mary: You are welcome. 1._____ 2._____ 3._____ 4._____ 5._____ |