健康孕妇在分娩时突然出现发绀、呼吸困难、休克应考虑为（） A.过敏性休克 B.羊水栓

企业文化氛围的维系和营造具体包括以下哪些方面（）。

A.定期更新广告、宣传栏的版面重置，标语、口号的色彩、字体、张贴方式的刷新

B.当频繁的检查与监督会使员工感到厌倦时，适当减少类似行为，淡化制度氛围

C.为了促进企业文化符合时代发展，及时更新企业内容

D.经常检查精神氛围的营造，及时地加以引导和修正，避免其产生负面影响，阻碍企业文化的发展

采穗圃优势（）。

A.穗条产量高，成本低

B.经营管理方便，操作安全

C.种条健壮充实，粗细适中

D.能保证种条遗传品质

E.收集和保存优树基因资源

Children whose biological parents both have Tic Syndrome Z (TSZ), which is characterized by the involuntary contraction of certain muscles, are about four times more likely to develop such contractions than are children whose biological parents do not have TSZ. It is likely, therefore, that predisposition to TSZ is an inherited trait.
Which of the following, if true, would most strengthen the conclusion above

A．Children whose parents have TSZ are more likely to develop TSZ if they are under unusual stress at school or at home than if they are not under such stress.

B．Children whose biological parents do not have TSZ are more likely to develop TSZ if they are raised by adoptive parents with TSZ than if they are raised by their biological parents.

C．Children whose biological parents have TSZ are as likely to develop TSZ if they are raised by adoptive parents who do not have TSZ as if they are raised by their biological parents.

D．Children whose biological parents have TSZ and who develop TSZ usually avoid developing a severe form of the syndrome if they seek treatment for TSZ shortly after developing the first signs of it.

E．(E) Children with TSZ whose biological parents do not have TSZ are less likely to have the syndrome diagnosed when symptoms first appear than are children with TSZ whose biological parents have TSZ.

关于成熟红细胞的叙述，错误的是（）。

A.细胞质中充满血红蛋白

B.无细胞核也无细胞器

C.细胞呈双凸圆盘形

D.细胞的平均寿命为120天

E.细胞内充满肌红蛋白