在Visual FoxPro中，关于自由表叙述正确的是 ______。A．自由表和数

(附加题)下列有关细胞工程的叙述，正确的是[ ]

A．再分化过程中有细胞形态、结构的变化，而脱分化过程中没有

B．同一株绿色开花植物不同部位的细胞经培养获得的愈伤组织基因不一定相同

C．灭活病毒通过溶解磷脂双分子层诱导动物细胞融合

D．单抗制备过程中，一次筛选所得的杂交瘤细胞都能够产生所需的抗体

根据句子的语境，填写适当的连接词。

1. He said_________he had finished his homework in time.

2. I really don't know________she is.

3. I don't know________he didn't attend the meeting that day.

4. Tom asked me__________I had received his email.

5. He wondered_________he could get it or not.

6. She wants to know________many books he has sent to to you.

7. Do you remember_________I told you last time?

8. Do you know_________bag it is?

9. I wonder_________is your favorite in these books.

10. He asked me_________these fruits cost.

进境活动物和动物产品检疫审批的有效期为6个月。 ( )

临床上高钾血症多见于（）。

A.频繁呕吐

B.严重腹泻

C.大量利尿

D.肾衰竭

E.原发性醛固酮增多症

以下哪项不是接触性皮炎的特点（）

A.有接触史，第一次发病有一定的潜伏期

B.皮损局限于接触部位，边界清楚

C.皮损形态较多，但在一个时期内以某一种皮损为主

D.自觉瘙痒

E.反复发作