在2007年10月24日18时，我国在四川省西昌卫星发射中心用“长征三号甲”运载

下列集合为∅的是（　　）

A．{0}

B．{x|x²+1=0}

C．{x|x²-1=0}

D．{x|x＜0}

用恰当的词语填空，完成对话。

L: Your sister's gone to Shanghai, 1______ she?

M: Yes.

L: How long has she been there?

M: She's been there since 2010.

L: Oh. It's about a year already! Have you 2______ from her?

M: Yes, of course. Very often. She wrote to me about a week ago and said she was quite busy there.

L: I see. Are you 3______ to write to her soon?

M: Soon? Look! I am writing a letter to her now.

L: Really? Will you please give my best 4______ to her?

M: Of course I 5______. Thank you.

男性，35岁，工地施工人员，下工前骨盆被重物挤压入院。查体：BP90/50mmHg，P120次／分，面色苍白，下腹部有压痛。Hb110g/L。X线示髂骨线性骨折。经补液治疗，生命体征平稳，但仍无尿，留置尿管仅有50ml尿液流出，淡红色。全腹部膨胀，移动性浊音阳性，试问下列哪一内脏器官的损伤可能性大（）

A.肾损伤

B.膀胱损伤

C.输尿管损伤

D.直肠损伤

E. * * 损伤

This is my sister. _____ name is Rose.[ ] 

A. Her                

B. She            

C. His

患者男性，44岁，因“左下胸受挤压，左侧第8、9、10后肋骨折，脾破裂”来诊。查体：面色苍白、四肢湿冷，脉搏120次/分，血压80/60mmHg（1mmHg=0.133kPa）。

休克患者使用血管扩张药必须具备的条件是（）

A.纠正酸中毒

B.心功能正常

C.补充血容量

D.先用血管收缩药

E.与糖皮质激素同用