加热炉辐射炉管材质是Cr5Mo的，其表面温度短期允许最高达到（）。A、630℃ B、

在光滑水平面上，动能为E₀、动量的大小为p₀的小钢球1与静止小钢球2发生碰撞，碰撞前后球1的运动方向相反.将碰撞后球1的动能和动量的大小分别记为E₁、p₁，球2的动能和动量的大小分别记为E₂、p₂，则必有（  ）

A．E₁＜E₀

B．p₁＜p₀

C．E₂＞E₀

D．p₂＞p₀

男性，30岁，头痛、复视1个月余，伴发热，体温38.5℃，无恶心呕吐，伴乏力、盗汗。查体：颈强直，克氏征(+)，布氏征(+)。胸片双肺未见明确病变，脑脊液无色透明，压力280mmHO，白细胞数0.12×10/L，葡萄糖0.8mmol/L，蛋白110mg/dl。氯化物95mmol/L，PPD(++)，脑脊液抗结核抗体(+)。

如该患者在强有力抗结核治疗及全身应用皮质激素治疗2个月后，脑脊液葡萄糖减低明显，逐渐出现视力减退，视野缺损。追问病史既往曾养鸽子，应与下列哪种脑膜炎相鉴别()

A．化脓性脑膜炎

B．隐球菌性脑膜炎

C．流行性乙型脑炎

D．脑囊虫

E．脑肿瘤

溴隐亭：

A．抗震颤及改善流涎效果好
B．作为多巴脱羧酶的辅基
C．促进DA能神经元释放DA
D．激动脑内纹状体DA受体
E．可治疗肝昏迷

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

8（）

A.toys 

B.clothes 

C.presents 

D.bills

水土保持方案工程规模是根据水土流失防治目标、（）和水土保持主要任务分析确定的。

A.主体工程规模

B.工程重要性

C.区域重要性

D.地质条件