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问题 多项选择题

腺苷脱氨酶（ADA）缺陷的临床表现有（）

A.骨骼异常

B.淋巴细胞数量减少

C.常染色体隐性遗传

D.免疫球蛋白进行性下降

E.基因治疗是常规的治疗方案

答案

参考答案：A, B, C, D

问答题

简述促销工具——宣传的作用。
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问答题

Directions:

Write a letter to invite your best friend Jane to take part in your mother’s 60-year-old birthday and inform her of your arrangement.

Begin your letter as follows.

Dear Jane,

You should write about 100 words on ANSWER SHEET 2. Do not sign your own name, using "Li Ming’ instead. Do not write the address.
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