下列有关天文知识的表述，正确的是( )。 A．开普勒制成人类历史上第一台天文望远镜

单词拼写。

根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。（每空只写一词）

1. Do you mind my classmate _____ (邀请) their friends here?

2. To our _____ (失望), other guests were not coming.

3. _____ (解释) this way, the question seems easy to understand.

4. The athlete won three gold _____ (奖牌) at the Olympic Games.

5. The _____ (结论) they drew was that the plan couldn't be practically performed.

6. Do you know which holiday in China falls on _____ (八月)the first?

7. Can you _____ (分开) promising students from the rest?

8. The scientist devoted his time to his _____ (试验)and succeeded finally.

9. Top artists invited from all over the country performed excellently for tourists at home and _____

(国外) last night.

10. Few people expect you to remember their names after they are _____.(介绍)

慢性白血病特点是（）

A.骨髓内原始细胞>20%，病程少于3个月

B.骨髓内原始细胞>30%，病程少于6个月

C.骨髓内原始细胞>40%，病程少于1个月

D.骨髓内原始细胞<5%，病程在半年以上

E.骨髓内原始细胞<2%，病程在1年以上

已知气体的相对分子质量越小，扩散速度越快。浓硫酸没有挥发性，浓氨水和浓盐酸都具有很强的挥发性，浓氨水会挥发出氨气，浓盐酸会挥发出氯化氢。下图所示为气体扩散速度的试验，两种气体扩散相遇时形成白色烟环。下列关于物质甲、乙的判断正确的是 （   ）。

A．甲是浓氨水，乙是浓硫酸

B．甲是浓盐酸，乙是浓氨水

C．甲是浓氨水，乙是浓盐酸　　

D．甲是浓硫酸，乙是浓氨水

关于亚硝酸盐中毒，错误的是（）

A.重症患者可给予高压氧舱治疗

B.主要机制生成高铁血红蛋白血症

C.典型症状为皮肤黏膜发绀，伴缺氧

D.小剂量亚甲蓝（美蓝）静脉注射有特效

E.大剂量亚甲蓝（美蓝）静脉注射有特效

在发电机空负荷运行时，自动励磁调节的调压速度，应不大于发电机额定电压1%/s，不小于发电机额定电压0.3%/s。